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Why is my PC monitor so dark?

Why reseating the graphics card in the PC will simply solve the "no signal" problem on my monitor?

  • Symptoms: 1. "no signal" displayed on monitor on cold boot (cannot even see BIOS). But i could see my PC light green and running normally (optical mouse lights up and keyboard num lock green after a while; just like a normal boot but w/o display on monitor) Then i have to push the power button on my PC to force it to turn off and on repeatedly many times before the monitor detects signal (monitor power indicator turns from orange to green finally...) However rebooting onwards has no problems. Only on cold boot. 2. Screen will blink (random times but very rare, the screen will turn black and after 2 sec reappear) 3. Sometimes screen just freeze and mouse cursor cannot move. Not even ctrl+alt+del. Had to force reboot by pushing the Power button on PC. Luckily my friend advised me reseat the video card and it WORKS! i suspect it might be a video card turning bad... it is 5 years old. But could it also be motherboard? Not monitor definitely. New. Only used 1 year. Any help? Ty

  • Answer:

    Hello, If the issue never occurs again, well there you go. However if you get a no signal problem again a video card would be a lot cheaper than a motherboard, could you borrow a video card if this occurs again. No signal problem on another video card would lead to the motherboard. Before changing motherboards try re seating the memory first and make sure there is no dust accumulation on the processor fan or power supply. Hopefully the no signal issue is already resolved.

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During operation of the computer the boards heat up. When turned off they cool down causeing them to flex back and forth. this causes the boards to become loose and also a slight electrical "glazing" on the contacts. Reseating the board will correct this for quite some time usually.

tomthegeek

The video card being reseated can help because the connectors on the video card may be worn. This will cause it to provide a poor signal and it takes a while before you catch that signal before it fizzles.

Dark L

1. you don't have enough ram, should have at least 256/512 if using xp 2. your motherboards caps are going bad, do you get funny smells if pc left on for a while and smell when you come back? 3. you don't enough power to power your pc, what is your psu size? 4. check your system has good cooling especially in summer as the graphics and cpu will get hotter and cause the symptoms you discripe

Aky P

Never argue with success. I assume when you reseated it you also disconnected and reconnected the monitor cable from the card. So you reseated the card and the cable. If the video card or motherboard was going bad I doubt reseating the video card would have done anything. Only replace the video card if you need to improve performance. There has been major improvements in video card performance over the last five years.

ray_8128

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