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It should be the host hardware.
In addition to the graphics card memory (of course, they are the most suspected) can see if the power supply can drive your machine.
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I've encountered such a problem, it's a monitor problem, and mine took it to repair it and cost 200 yuan.
It's a display backlight problem.
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The screen is not broken, the system is wrong, it is recommended that you redo a new system or restore it!
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Estimated to be caused by insufficient video memory.
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Turn on your computer and clean up your graphics card and memory.
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There is no self-test screen, which is generally a memory problem. Unplug the memory and wipe the gold finger that touches the bottom.
Of course, it can't boot after passing the self-test, which may be a problem with the boot disk.
Use a USB flash drive to guide it to see the situation.
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Generally, the computer screen does not display or the computer does not start, there are the following four situations:
1. Loose memory modules, poor contact, and dust accumulation will cause the screen to not be displayed and not started.
Solution: Unplug the power supply, remove the memory module, remove the floating dust at the interface with an eraser, and wipe it clean with letter paper.
Put the memory module in alignment, put the index finger of both hands against both ends of the card holder, press the memory module with your thumb, press down, and hear the "click" sound, it's OK.
2. Loose graphics card, poor contact, and dust accumulation will cause the screen not to be displayed and the computer not to start.
Solution: Unplug the power supply, remove the graphics card, remove the floating dust at the interface with an eraser, and wipe it clean with a letter paper. Align the graphics card, press down and fix it, and you're done. The graphics card is damaged and needs to be replaced.
3. Motherboard problems. Solution: Unplug the power supply, remove the motherboard battery, and jump the CMOS jumper to"colse"position, hold for more than five minutes, install the battery, and resume the jumper.
That's it. Or use a paper clip to turn on the positive and negative electrodes of the CMOS on the motherboard for more than five minutes, and it will be OK.
4. There is a problem with the monitor and VGA cable. Solution: Test and judge on another machine. Reconnect, tighten the VGA plug.
According to the narrative, it is more likely that the display will have problems with the VGA connection, memory sticks, or loose graphics cards.
Suggestion: Check in the order of memory first, then graphics card, then motherboard and monitor, it will be more efficient to find the problem.
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If the hardware contact is not good, there are several possibilities that it will crash, 1. There is too much dust, 2. The hard disk has bad sectors.
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Chassis power failure! It's old, isn't it? I've been in this situation too, so change the power supply! (It's the chassis power supply, not the motherboard battery).
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Motherboard alarm sound.
1 Short: The system starts normally.
2 Short: General error, please go to CMOS Setup and reset the incorrect options.
1 Long: There is an error with RAM or motherboard. Try to change the memory, if it still doesn't work, you have to change the motherboard.
1 long and 2 short: The display or graphics card is wrong.
1 long and 3 short: The keyboard controller is wrong. Check the motherboard.
1 Long 9 Short: Motherboard Flash RAM or EPROM error, BIOS corruption. Try a different block of flash ram.
Constant ringing (long sound): The memory module is not plugged in tightly or is damaged. If it still doesn't work, you can only replace a memory module.
Repeated, short ring: There is a problem with the power supply.
No sound and no display: There may be a problem with the power supply. Are you sure it's not a system issue.
Motherboard alarm sound.
1 Short: The system starts normally.
2 Short: General error, please go to CMOS Setup and reset the incorrect options.
1 Long: There is an error with RAM or motherboard. Try to change the memory, if it still doesn't work, you have to change the motherboard.
1 long and 2 short: The display or graphics card is wrong.
1 long and 3 short: The keyboard controller is wrong. Check the motherboard.
1 Long 9 Short: Motherboard Flash RAM or EPROM error, BIOS corruption. Try a different block of flash ram.
Constant ringing (long sound): The memory module is not plugged in tightly or is damaged. If it still doesn't work, you can only replace a memory module.
Repeated, short ring: There is a problem with the power supply.
No sound and no display: It may be that there is a problem with the power supplySolution: Clean the dust in the case, wipe the memory and the gold finger of the graphics card with an eraser.
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Check whether the cable between the monitor and the main unit is loose.
If not, it may be a malfunction caused by poor hardware contact.
1. Turn off the power, open the case, clean up the dust, especially the dust of the CPU fan, and check whether the CPU fan is rotating normally.
2. Plug and unplug the memory, wipe the gold finger part with an eraser, and re-insert it (don't reverse it).
3. Plug and unplug the graphics card, wipe the gold finger part with an eraser, and reinsert it tightly (the buckle should be buckled).
4. Unplug the power cord, cut off the motherboard button battery, wait for three minutes, and then reinstall the motherboard.
5. If the above operations cannot solve the problem, it is recommended to send it to the maintenance center.
As soon as the motherboard is powered, the battery on the motherboard is removed, and then the positive and negative poles are short-circuited with metal, and then the battery is installed and the BIOS is set again.
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