Diagnosing motherboard disease by card test

Laptop mainboard restore work usually takes lots of time with out good assist instruments. So the mainboard take a look at card is an indispensable device for repairing the mainboard of a PC or Laptop computer. Information you to diagnose motherboard illness by take a look at card.

The mainboard take a look at card has many sorts and prices from 100 – 800k relying on the operate of the cardboard and better accuracy. The mainboard take a look at card is generally used through PCI interface. At present, there are tet playing cards for mainboards utilizing H61 chipset through PCI e 1X interface and costing about 800K can be utilized for each Laptop computer and PC. As well as, should you should not have the situations to purchase and take a look at Laptop computer, please confer with the article: Find out how to customise the laptop computer mainboard take a look at card.

1. Mainboard take a look at card form

• Slots through PCI and PCIE1x interfaces.
  Led indicator gentle 3v, 5v, 12v.
  Led RST: This gentle will gentle up after which flip off to sign a reset pulse. This pulse is essential, if this gentle doesn’t gentle or stays on on a regular basis because of the voltage lack of the RAM circuit, CPU, chipset… Error IC clock, SIO, male chip.
  LED indicator CLK: Signifies the clock has labored effectively.
  The 7-segment Led (2 or 4) to report the POST code: That is a very powerful Led primarily based on which we will diagnose what’s unsuitable with the mainboard.
  Some older take a look at playing cards could not have or have another indicator lights akin to: IRDY, Body, Run.The mainboard take a look at card will not be constant between BIOS producers (AMI, Award) so it’s going to  LED on some mainboards and incorrect on another mainboards.

  2. Perform of mainboard take a look at card

  As talked about above, the take a look at card is used to test the mainboard by way of the code on the LED and primarily based on the code doc of every BIOS firm. For instance, you obtain a mainboard that doesn’t flip up, should you should not have a take a look at card, you have to measure whether or not the voltage sources are sufficient or not? If the voltage is sufficient however not working, you have to evaluation the CPU, BIOS, Chipset. For those who use the mainboard take a look at card, there’s a system reset sign on the cardboard -> OK energy. You simply have to load BIOS, Examine CPU. Restore time can be sooner and extra correct.

  3. Find out how to use take a look at the H61 mainboard.

  First, unplug all sign and energy cables from all gadgets. Solely go away the proper mainboard + CPU + RAM + Card take a look at primary.

  Activate the facility and observe the useful LEDs on the mainboard take a look at card to diagnose the illness.

  A lot of the 3.3v, 5v, 12v energy LEDs can be totally lit, if these lights are lacking, you want to test the contact pins of the cardboard and the PCI slot on the mainboard.
  CLK indicator (indicating whether or not there’s a clock pulse or not): Normally that is not often used as a result of the cardboard usually can’t test the clock. To measure the clock pulse, you want to use a superb VOM meter, or use a frequency meter. If the cardboard is sweet, the clock gentle have to be on to point a pulse, if the sunshine will not be on, the CLK pulse can be misplaced.
  RST indicator: After we activate the facility, the  RST gentle will gentle up after which flip off and reset repeatedly. If it does not gentle up or it does not flip off on a regular basis, it is a lack of reset pulse -> have to test the supply once more, the bridge chip is south.
  After observing the useful LEDs, monitor the 7-segment LEDs.
  If the led gentle says ” no-C ” ” 0000 ‘ ” – – ” : That is probably the most troublesome illness to repair as a result of it has many causes: BIOS error, CPU socket open, South or North Chipset error, IO error, energy IC error For those who encounter this illness, you want to use the elimination methodology from simple to troublesome.
  The take a look at card instantly reviews the code FF or C0: It’s the similar as on many errors: chip South, North, CPU, BiOS…

  After trying on the code on the useful led, you depend on that code and lookup the code desk (when shopping for, the e-book will lookup the code desk) to see what your mainboard is affected by. It will take some time to recollect.

  * Frequent errors

  If the cardboard jumps to code C0, C1 or D0, D1… These errors are often attributable to the motherboard and CPU not working, however may be  attributable to unstable CPU provide Vcore, lack of RAM BUS or primary CPU not supporting CPU.

  If the take a look at card jumps the code round (flip off the pc, then leap one other code), it is largely due to the BIOS error, simply reload the BIOS. There are additionally instances the place the code jumps randomly, however it’s not a BIOS error, however because of the nature of the faux take a look at card, the report is wrong.

  If the take a look at card is reused at code  26, then it’s best to earn money to purchase one other take a look at card. This error is because of the nature of the defective take a look at card. Frequent once we test on Gigabyte and Intel mainboards.

  Led 7 phase code code C5, D6, 05 relying on the kind of motherboard utilizing BIOS of any firm. This code is generally resulting from a BIOS error, you need to reload the BIOS.

  The take a look at card runs to code  7F, then the mainboard has began up reveals up. As a result of the BIOS setting is unsuitable, it stops asking to press the F1 key to proceed or F2 to enter the BIOS settings. After we press F1 to proceed, the take a look at card will leap to FF after which the mainobard is as much as regular. As well as, when this code is reached, the numlock gentle is on however not on, you want to test the discrete VGA card, onboard, monitor cable, LCD display screen.

  After we activate the facility, if the speaker mounted on the maiboard continues to “beep”, a lot of the mainboard and  CPU are energetic. If not, then you want to test VGA, video card.

  After we energy on the mainboard and see the principle take a look at card one after the other jumps the codes from Co, C1… D0, D1… EA… 7F after which FF, then the mainboard is already working utterly. If it does not present up, you need to test the display screen, the video card.

  The mainboard take a look at card jumps code C0, C1.. after which stops C5, C6 or D5, D6, EA, most of it’s Ram error, want to wash RAM slot, RAM pins (should ensure RAM continues to be in good use). If not, you want to test the RAM BUS supply, steam or exchange the Northbridge chip.

  Above are directions on tips on how to use the mainboard take a look at card and a few widespread errors. Good luck to you guys, in case you have any questions, simply go away a remark beneath the article.