Member Avatar for Computer_

Earlier today I downloaded a game recording client from wegame.com and macromedia flash 8. After both were done my computer froze up so i had to reset. Everything seemed fine so i started working on macromedia. In the middle of me working on it the monitor turned black and said that there was no input signal. The computer turns on fine, but there is no input signal for the monitor, and i can't get the keyboard to connect, the number lock and caps lock wont flash or turn on. I'm not sure if it could be a virus from wegame.com or a video card problem, or some other computer part problem.

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  • Latest Post Latest Post by avisarkar

Dani AI

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A short expert addendum: the combination reported by — monitor saying “no input signal”, no BIOS/POST text, and keyboard LEDs failing to light — points to a failure before the operating system loads. That makes firmware/hardware (power delivery, motherboard/CPU/RAM, video card or cable/handshake) the primary suspects. A downloaded program or virus cannot stop the BIOS from running or prevent a keyboard from being enumerated at POST.

  1. Verify monitor and cable. Confirm the monitor’s on‑screen menu and test the cable/port with a known working PC or laptop. A monitor that shows its OSD but reports “no input” on this PC narrows the fault to the PC side.
  2. POST and keyboard diagnostics. Attach a PS/2 keyboard if available and connect a small case speaker to the motherboard header. Note any beep codes or POST LEDs. Visible POST text means the problem is software/driver-related; no POST with spinning fans usually implicates PSU/motherboard/CPU/RAM.
  3. Minimal‑boot isolation. With mains unplugged, remove all nonessential devices (HDD/optical, extra PCI cards, USB devices) and leave CPU, cooler, one RAM stick (use the recommended slot) and video output. Make sure the 24‑pin and 4/8‑pin CPU power cables are seated. Power on and watch for POST.
  4. PSU verification. Use a PSU tester or multimeter to check 5VSB and +12V rails, or swap in a known‑good PSU. The paperclip test is risky; prefer a tester or a donor PSU if possible.
  5. CMOS and visual check. Clear CMOS (jumper or remove battery), reseat RAM/GPU/power leads, and inspect the board for bulging caps or burn marks.
  6. Video card isolation. Test the suspect GPU in another PC or try a known‑good card in this machine. If onboard VGA is present, use it briefly to separate GPU faults from motherboard/PSU faults.

If POST appears after these steps the issue is likely OS/driver related and system repair/restore is next. Intermittent cases like ’s often trace to overheating, failing caps or flaky PSU. This expands on points raised by and . Safety: unplug mains and ground before touching components; if uncertainty remains, seek a bench test from a repair shop.

Recommended Answers

All 12 Replies

Member Avatar for Xlphos

Hello,

Do you get anything displayed at all before booting into your operating system, e.g. boot up messages, logos etc...

Can you enter BIOS?
Which opearating system are you using?

Member Avatar for enn

hi good day i have similar problem with you. but the diffences is sometime the monitor says press f8 to ..... then press del to inter set up something like that but still i cant do because the keyboard cant be detected. i tried another keyboard but still the same problem . by the way im using service pack 2 windws xp 2007. ive tried to detach the video card and returned it several times but still not working. when i plug the keybord it will litgh for 2 sec. only and dont ligth again.

Member Avatar for enn

so please any one can help us????

Member Avatar for Computer_

Hello,

Do you get anything displayed at all before booting into your operating system, e.g. boot up messages, logos etc...

Can you enter BIOS?
Which opearating system are you using?

I dont get any type of messages, just the monitor saying that there is no signal. I have tried putting the volume up all the way and see if the sound that windows makes when it boots up will sound, but the way my computer works i have to press a button before it can actually start up, so im really not sure. I do know that the hard drive does turn over.

Member Avatar for Xlphos

Hello,

Does the computer beep or anything when you turn the PC on?
Have you any other graphics cards to try?
Have you tried different monitors and cables?
Do you have dedicated graphics, onboard or both?

- Let us know how it goes

Member Avatar for riconeill

I have the same problem as soon as I boot I get the floating no video input and it continues to peep there is no key board and I can not get to bios I have been told it is the video card just plain old given up! get a new one!! is this true

Member Avatar for matrix4495

if you can see the bios your video card is fine if not try to plug your display to onblard VGA slot. if that does not work. check if the display is fine and check your board as well.

Member Avatar for sanjuanair

Some times if we install software or games that will reset all our registry setup and windows default setup.See ur system will not burn down bcos u installed a s/w.
So best ay try to resore your system to a back date.
another option is try to install or repair ur os withwindows cd.

it seems s/ w problem.

Member Avatar for purrdog

Out of a clear blue sky my pc screen freezes and when I reboot it sometimes comes back on and works. But when it doesn't I get a message on the monitor no input signal. I discovered that when I turn the monitor power switch on and off a couple of times and try to start up again, it will start and work fine.

Member Avatar for purrdog

To solve my no input signal problem, I opened the tower and thoroughly cleaned the dust from in side. I was advised the the reason I was having a problem was because of the dust accumulation, the motherboard was overheating, causing my screen to freeze and forcing my to reboot. Until the machine had a chance to cool down, I could not get the pc to work and got the no input signal message on the monitor when I tried to restart.

Member Avatar for avisarkar

its may be smps promlem

commented: Same post three time in a row. Don't feed the zombies -2
Member Avatar for avisarkar

this problem releted with ram or board

commented: you don't need to revive old threads... also please improve your english -1
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