Services & Support
Services & Support
Since EVOC has been vigorously developing channel sales, many customers have purchased EVOC complete PCs from EVOC distributors. According to the level of authorization by EVOC, some distributors have the authority to purchase parts from EVOC and assemble EVOC brand complete PCs by themselves. In order to help customers distinguish whether the complete PCs they purchased are EVOC original complete PCs and whether the purchased complete PCs enjoy the relevant after-sales services of EVOC, this article will share with you how to identify EVOC original complete PCs/non-original complete PCs and the differences in related service policies.
1.Different definitionEVOC original complete PC: Refers to products assembled and produced by EVOC and sold as complete PCs. Original complete PCs are affixed with the complete PC model and serial number labels of the EVOC factory. The complete PC structure should at least include a chassis, motherboard, backplane, CPU, power supply, memory and hard disk (or CF card, etc.).
Non-original complete PC: Refers to products assembled by EVOC, including chassis, motherboard, backplane and key components (these four major components are also called "barebone"), and sold by EVOC's authorized distributors after adding or removing some product components or software.
2.Different model number and barcode number
EVOC original complete PC: The model number is determined according to the product catalog. There are many different kinds, and the barcode number starts with E6, such as IPC-820 E6DGML2706XXXX (X represents a digital serial number).
EVOC non-original complete PC: The barcode number starts with E5, such as IPC-810 E5DGMK1001XXXX (X represents a digital serial number).
3.Different service policy
The free warranty period and service method for non-original complete PC are subject to the commitment or sales contract of the authorized distributor who directly sells them. For the original EVOC parts in the non-original EVOC complete PC, EVOC provides the following services:
Service method: "Express repair service" (return to the designated or nearest repair outlet of EVOC for repair).
Warranty period: 2 years. If the customer requests to extend the warranty period, it will be considered as paid warranty.
Original complete PC:Service method: Customers can choose "Express repair service" or " On-site repair service" according to their own situation. " On-site repair service " is a paid service, which is provided according to the definition in the contract and based on the PC's barcode query.
Warranty period: 2 years. If the customer requests to extend the warranty period, it will be considered as paid warranty.4.How to identify the original machine:
The four-digit number 0010 in the red frame is an original complete PC
The four-digit number 0020 in the red frame is a non-original complete PC
The number 6 in the red frame is an original complete PC
The number 5 in the red frame is a non-original complete PC
The number 5 in the red frame is a non-original complete PC
The number 6 in the red frame is an original complete PC
The original complete PC has fragile stickers on the screws on the body. PC without fragile stickers is not original complete PC or the original complete PC has been disassembled.
1、High temperature
The ideal operating temperature of industrial computers should be 10℃ ~35℃. Too high or too low a temperature will affect the life of accessories. High temperature damages computers mainly to temperature-sensitive accessories such as CPUs, monitors, and motherboards. For example, the CPU generally has a maximum operating temperature of no more than 80℃. If the CPU works at an ultra-high temperature for a long time, it will not only shorten its service life, but may even burn out. Therefore, cooling the CPU is a big deal. In addition, it is best to install temperature alarm software. When using it in summer, pay attention to indoor ventilation and cooling. When using it outdoors, if it has an LCD display, various anti-ultraviolet measures must be taken to avoid damage to the LCD display due to long-term exposure to strong ultraviolet rays.
2、 Humidty
For computers, a relative humidity of 30%~80% is more suitable. If the humidity is too high, it will not only affect its performance, but may even cause dangerous situations such as short circuits due to moisture, and in serious cases, burn some components. Therefore, when the air is too humid or when it rains continuously, you should be cautious when turning on the computer. In addition, never use a computer with wet hands, or wipe the chassis with a cloth dipped in water (especially where the computer is connected). On the other hand, too dry is not good either, because it is easy to generate static electricity, which is also harmful to the computer.
3、Unstable power supply
Stable power supply is also important for using computers. Unstable voltage or instantaneous peak current can cause fatal damage to computers. For example, under low voltage conditions, the monitor will have a screen distortion phenomenon, which will affect the display effect in the long run. The normal requirement for computers for AC power is 220V, the input frequency is 50±2.5Hz, and it is best to have a good grounding system (use a three-phase socket). Of course, the best way is to use a UPS voltage stabilizer power supply, which is much safer.
4、Dust
Since the computer case is not completely sealed, and the static electricity generated when it is working has the effect of absorbing dust, it is easy to be contaminated with dust. When dust is attached to the surface of the dustproof net, it will cause the case to be blocked from ventilation and poor heat dissipation. In serious cases, it may even cause a short circuit in the motherboard circuit! For the monitor, a small amount of dust may cause the high-voltage circuit inside the monitor to ignite, which may cause it to burn. In addition, most accessories such as keyboard, mouse, power supply fan, etc. are afraid of dust.
5、Vibration or collision
Among the chassis accessories, the hard disk and optical drive are the most afraid of vibration, followed by the floppy drive, and of course the monitor screen must not be "collided"! The working principles of the hard disk, optical drive and floppy drive are very similar. They all use magnetic heads (laser heads) to read the rotating disk. Therefore, once there is a severe vibration or collision, the working magnetic head (laser head) may hit the disk, scratching the disk and damaging the magnetic head (laser head). In severe cases, the entire hard disk or optical drive or floppy drive is completely destroyed. Of course, the loss of data stored on the disk is even more serious.
6、 Static electricity
Static electricity has always been a fatal killer of precision components. Among the accessories of industrial computer, the motherboard is of course the one with the most concentrated components. Since static electricity has the characteristic of accumulation, when it accumulates to a certain extent, there will be an instantaneous partial high-voltage discharge, and the huge energy is enough to burn the "delicate" components and the BIOS on the motherboard. The simplest way to solve static electricity is to discharge the computer frequently. Just touch it with a metal object. In order to prevent static electricity, please wear anti-static gloves when installing chassis components. After installation, you'd better check whether the chassis is really grounded.
7、Radio interference
This "killer" is often ignored by many people. In fact, it is very harmful to the display. Since traditional displays work by electromagnetic fields, when there are strong radio signals from the outside world (such as using a mobile phone next to a computer), the electromagnetic field of the display will be seriously disturbed, causing the image to shake violently. If this happens many times, the normal working state of the electromagnetic field of the display will be affected, which will directly affect the display effect.
When the computer is powered on and self-tested, if a fault occurs, there will sometimes be an alarm sound, and different alarm sounds represent different error messages. According to the meaning of these messages, it is not difficult to make corresponding diagnoses. The following is a brief introduction to the specific meanings of common power-on self-test alarm sounds based on the mainstream AWARD BIOS and AMI BIOS:
AWARD BIOS
1 short beep
The system boots up normally.
1 long 1 short beep
There is something wrong with the memory or the motherboard. Try changing a memory stick. If that doesn't work, the motherboard is broken.
2 short beep
This is a common error. Enter the CMOS settings and change the incorrect settings or optimize the settings.
1 long 2 short beep
Display or graphic card error.
1 long 3 short beep
Keyboard control error.
1 long 9 short beep
The FLASH RAM or EPROM on the motherboard is error, the BIOS is damaged.
Long beep
Failed to read memory. Reinsert or replace the memory.
Repeated short beep
Power supply error
AMI BIOS
1 short beep
Memory refresh error, replace the memory.
2 short beep
Parity check error.The first 64K memory chip has a parity check failure. You can set the memory ECC check to Disabled in the CMOS settings.
3 short beep
Memory chip detection error, replace the memory.
4 short beep
System clock error.
5 short beep
CPU error
6 short beep
Keyboard control error
7 short beep
System mode error, cannot switch to protected mode.
8 short beep
Video memory error, replace the graphic card.
9 short beep
ROM check failed. The ROM check value is different from the value recorded in the BIOS.
10 short beep
CMOS register read and write errors, SHUTDOWN register failure in CMOS RAM.
11 short beep
CACHE error
1 long 3 short beep
Memory error or damage, replace it.
1 long 8 short beep
Display detection error, the monitor data cable is not properly plugged in or the graphic card is not properly plugged in.
Eight things to do of troubleshooting
1、First analyze where the problem may be, then take action.
2、Practice shows that many faults are caused by dirt, and the faults often disappear automatically once they are cleaned.
3、First check the computer's external power supply, devices, and circuits, then open the chassis and check.
4、Distinguish whether it is caused by mechanical reasons or electrical problems.
5、Start with the software judgment, and then start with the hardware
6、Many faults are often caused by poor power contact or no plugging.
7、First eliminate common faults with universality and regularity, and then check special faults
8、Check the peripheral circuit first, if the peripheral circuit is normal, consider replacing important components.
In addition, when using any software, including shared and beta software, it is best to set aside a hard disk partition for installing these software, and install only one software at a time for testing, to avoid being confused about which newly installed software has a problem when a problem occurs. If possible, install two systems in different partitions of the hard disk, one for the main system and one for the backup system. When the main system does not work properly, you can use the backup system.
1、Cleaning method: For computers that are used in a poor environment or have been used for a long time, they should be cleaned first. You can use a brush to gently brush away the dust on the motherboard and peripherals. If the dust has been cleaned away or there is no dust, proceed to the next step of inspection. In addition, since some cards or chips on the board are in the form of pins, vibration, dust and other reasons often cause pin oxidation and poor contact. You can use an eraser to wipe off the surface oxide layer, re-plug it, and then turn on the computer to check whether the fault has been eliminated.
2、Direct observation method: that is, "look, listen, smell, and touch". "Look" means to observe whether the plugs and sockets of the system board are crooked, whether the resistors and capacitor pins touch each other, whether the surface is burnt, whether the chip surface is cracked, and whether the copper foil on the motherboard is burned. Also check whether there are any foreign objects falling between the components of the motherboard (causing a short circuit), and you can also check whether there are any burnt and discolored places on the board, whether the traces (copper foil) on the printed circuit board are broken, etc. "Listen" means to monitor whether the working sounds of equipment such as the power supply fan, the floppy disk motor or the seek mechanism, and the display transformer are normal. In addition, short circuit failures in the system are often accompanied by abnormal sounds. Monitoring can timely discover some potential accidents and help take immediate measures when accidents occur. "Smell" means to smell whether there is a burnt smell in the host and board, which is convenient for discovering faults and determining the location of the short circuit. "Touch" means to press the active chip of the tube holder with your hand to see if the chip is loose or in poor contact. In addition, when the system is running, you can touch or get close to the casing of the CPU, monitor, hard disk and other devices with your hand to determine whether the device is operating normally based on its temperature; if you touch the surface of some chips with your hand and it is hot, the chip may be damaged.
3、Plug-in method: There are many reasons for PC system failures. Failures of the motherboard itself, I/O bus failures, and various plug-in card failures can all cause the system to operate abnormally. The plug-in method is the simplest way to determine whether the fault is a board problem or an I/O bus problem. This method is to shut down the computer and pull out the plug-in cards one by one. Each time a card is pulled out, the computer must be turned on and run. Once the motherboard runs normally after a card is pulled out, there is a problem with the plug-in card or the corresponding I/O bus slot and load circuit. If the system still does not run normally after all plug-in cards are pulled out, it is likely that there is a problem with the motherboard. Another meaning of the plug-in method is that some chips, boards, and slots have poor contact. Pulling out these chips and boards and reinserting them correctly can solve the faults caused by poor contact.
4、Exchange method: Exchange the same type of plug-in boards, plug-in boards with the same bus mode and functions, or the same type of chips, and determine the fault location based on the changes in the fault phenomenon. This method is mostly used in easy-to-plug maintenance environments. For example, if the memory self-test fails, the same memory chip or memory stick can be exchanged to determine the fault location. The fault phenomenon remains after exchanging between fault-free chips. If the fault phenomenon changes after the exchange, it means that one of the exchanged chips is bad, and the location can be further determined by exchanging them one by one. If the same type of microcomputer components or peripherals can be found, the exchange method can be used to quickly determine whether it is a quality problem of the component itself. The exchange method can also be used in the following situations: if there is no microcomputer component or peripheral of the same model, but there is a microcomputer host of the same type, the microcomputer component or peripheral can be plugged into the host of the same model to determine whether it is normal.
5、Comparison method: Run two or more identical or similar computers. Based on the different performances of the normal computer and the faulty computer when performing the same operation, you can preliminarily determine where the fault occurs.
6、Vibration tapping method: Gently tap the chassis shell with your fingers, which may solve the fault caused by poor contact or poor soldering. Then you can further check the location of the fault point and eliminate it.
7、Heating and cooling method: Artificially raising the temperature of the microcomputer operating environment can test the high temperature resistance of each microcomputer component (especially the CPU), so as to discover potential accidents early. Artificially lowering the temperature of the microcomputer operating environment, if the failure rate of the microcomputer is greatly reduced, it means that the failure is in the high temperature or high temperature resistant components, which can help narrow the scope of fault diagnosis. In fact, the heating and cooling method adopts the principle of fault initiation, which creates the conditions for the occurrence of faults to cause the frequent occurrence of faults in order to observe and determine the location of the faults.
(A) CMOS Battery State LOW;
(B) Keyboard Interface Error;
(C) Hard disk drive failure;
(D) Missing operating System;
(E) Non System Disk Or Disk Error;
(F) Invalid Drive Specification;
(G) HDD Controller Failure BIOS;
(H) Drive Error.
EVOC industrial computer power supplies all have protection functions such as "overload" and "light load". When "overloaded", the power supply will automatically cut off the output. When "lightly loaded", the output voltage will be slightly higher or lower, but it will not affect the normal operation of the computer. You can remove all loads and turn on the power switch. It should be the same as the phenomenon when the power supply is in the "light load" state. Then you need to check whether there is a short circuit in the power supply output. Generally, it may be caused by a short circuit between the bottom plate and the chassis or a jumper error on the passive bottom plate (such as shorting JP3 on the IPC-6114P7).
Power-on sequence: There are several situations for power-on:
1、First time power-on: You should turn on the power of peripherals (such as monitors, speakers, printers, scanners, etc.) first, and then turn on the power switch of the PC.
2、Restart the computer: This means that the computer crashes for some reason during operation or needs to be restarted after running certain programs. There are three ways to do this:
First, press and hold the "Ctrl", "Alt" and "Del" keys on the keyboard at the same time, and the computer will automatically restart;
Second, if the previous method does not work, directly press the "RESET" button on the computer chassis to restart the computer;
Third, if the first two methods do not work, just press the "POWER" button on the computer chassis to restart the computer, just like the first time you turn it on.
Shutdown sequence: When the computer is powered on, the moment the power of the peripherals is turned off, a large current surge will be generated on the power supply. Therefore, the computer power should be turned off using the correct method first, and then the peripheral power should be turned off, so as to reduce damage to the hardware. When the computer is performing read and write operations, the power supply must not be cut off to avoid damage to the hard disk. The computer cannot be started immediately after shutdown, and it is best to start it after 10 seconds.