Generally speaking, this kind of situation
1 Memory and video card are not inserted correctly.
2 The memory or graphics card is broken, and the graphics card is the easiest to break.
Remove one of the two memories and try it.
The computer won't open, and the blue light on the monitor turns yellow. Start it repeatedly to see if there are any memory chips or poor contact with dust.
When the computer is turned on, SIGAN does not appear on the display, and the green light turns yellow. What happened? Your monitor is not plugged into the host. Try plugging it in again.
The host can start, self-check, the display shows yellow light, long press the display switch, green light, no signal on the display, 3 seconds, yellow light, black screen, what's the matter? If there is nothing wrong with the monitor itself, there are generally only three situations in which the black screen does not respond:
1, power failure
2, motherboard failure
3.CPU failure
Possible reasons, I suggest you disassemble the chassis to clean the dust once, and look at the hardware after plugging and unplugging once.
I met two college students with similar problems here. I thought it was one of the three traditional reasons, and finally it was caused by dust. Just wash it.
The computer host is turned on three times before it is turned on. The monitor is black and the blue light turns yellow. What's the matter? Hello, 60% may be that your memory is out of order. You can disassemble the host, then unplug the memory stick, and then wipe the edge of the memory stick with an eraser and plug it in. If it really doesn't work, it may be that your memory is broken. I suggest you fix it.
40% may be your motivation. So that your motherboard can't work normally, then start it several times to restore the power supply voltage.
Thank you. I hope your problem will be solved soon.
When the desktop computer is turned on, the blue light on the display immediately turns yellow, and the black screen of the display indicates that the display screen has not received the signal from the host computer. If the machine has been working normally, it is only now that there is a problem, and then check whether the signal line is loose. If the signal line is not loose or damaged, check whether the host and graphics card are normal.
Is the keyboard indicator on? If it is on, there is something wrong with the monitor. If you don't open it, you still have memories. Graphics card. Poor CPU contact, usually memory.
When the computer is turned on, the host lights up, and the display screen changes from blue light to yellow light. When the main switch is pressed, there is no response. What happened? Disassemble the chassis to see if the accessories inside are loose, especially the memory and graphics card, and disassemble and reinstall them. Try again!
The computer can start, but there is no signal on the monitor, and the indicator light is only yellow. Which blue light is not on? What happened? If the computer startup speaker has a startup sound, or the hard disk light flashes regularly all the time, then your display interface circuit is burnt out and needs to be repaired.
If there is no sound in the computer speaker, the hard disk light never flashes or flashes for a long time just after the computer is turned on, then your host computer is broken.
If the computer can be turned off by pressing the switch after starting, it means that the host is good. If you have to press the switch for four seconds to turn it off, it is that the host is broken.
Make sure you don't drop the line first, or you will make a joke.
What is the flashing yellow light on the computer monitor? This is not bright.
The most common reason why the monitor doesn't light up is that there is something wrong with the host hardware.
Solution:
1. Open the side panel of the main chassis.
2. Reseat the memory, graphics card, hard disk data cable, hard disk power cable, motherboard 20P power cable and CPU power cable.
3. Turn on the machine to see if it lights up. If it doesn't, it will be solved by replacing the hardware.
1) Turn on the computer after replacing the memory. If it is judged that the memory fails normally, it needs to be replaced.
2) If the problem is still not solved after replacing the memory, replace the graphics card, and judge the fault of the graphics card after the problem is solved.
3) If it is an integrated graphics card, it can be judged independently. If the problem is solved, it can be judged that the motherboard integrated graphics card is faulty.
4) If the memory, graphics card or even CPU is replaced, it must be determined that it is a motherboard problem, and this situation needs to be repaired or replaced.