What does the FD of the fault diagnosis card mean?

FD appears in ** Write a program or a drawing Can you make it clear On the air conditioning drawing, FD is a fire damper.

What is displayed in **.

That's where the problem is on the computer.

For example, 0000 fffff may be a problem with the CPU, and different diagnostic cards are different.

You can look it up online.

The best way to do this is to read the instructions for the motherboard diagnostic card, which has a more detailed explanation!

The things shown are all sent by the BIOS. In fact, when the BIOS runs to a specific place, it will send out a display signal. For ami bios:

For example, when the BIOS runs to the initialization memory phase, D5 will be displayed, and if it is initialized, it will display 2A. In fact, this does not make any sense for the motherboard to work. It exists only to make it easier for engineers to judge that something is wrong.

For example, if it shows d5, it stops. Represents that there may be a problem with your memory. In the same way, when 2A does not move, there may be a problem with the graphics card.

Specifically, you should first tell whether it is an AMI BIOS or an Award BIOS

Two cards: 26 means that the boot is successful and there is no problem with the hardware. 84 or 85 is also a success. c1 indicates that the memory detection fails. The memory is not plugged in properly or the memory is corrupted.

Four-digit card: 2625 means that the boot is successful. FFFF or 00FF or FF00 means that the computer does not boot, it may be that the motherboard or CPU is bad, but the motherboard is more likely, and the CPU is rarely broken.

Of course, the motherboard or CPU is fine, but the motherboard is automatically protected, at this time, you need to clear the CMOS discharge, reboot and try again. c1c0 indicates that the memory is not plugged in properly, or there is a problem with the memory.

I know one. It means that the motherboard did not ask for it.

Motherboard diagnostic card, must cooperate with the manual to work, in order to find out what the problem, no manual, find a way, find a copy, it doesn't matter. Ask the person who bought the medical card.

See the information for yourself in absolute detail.

Meaningless to see if the diagnostic card is not compatible well.

I know to tell you, that's that, this, and those, these, and that's, and that's, you know.

Generally, the four-digit test card is better.

I'll tell you about the ** that often comes out.

FF or 00 CPU main power supply problems generally look at CPU memory graphics card capacitance MOSFET i o North Bridge.

C0 or C1 northbridge memory slots.

A6 or A7 memory power supply for memory.

26 or 27 graphics card power supply graphics card slot northbridge.

The 35 or 45BIOS program is not right.

That's what is often said that maintenance experience is very important, and I can only say that these are the only things that can be gained in maintenance.

Computer Hardware Engineer Jinan Jin Qiang.

62 Start the system boot with an interrupt of 19 hours. Tested with DMA 1 basic registers; Testing of the DMA 2 register is coming soon. Test the extended memory address line.