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Hi!

Well, I'm not onmy own computer so I cut this short:

I wanted to start my computer today and it doesnt seem to give out any output. At first I thougt it would be the graphics card as I installed it recently, however, not only does the screen show me the big bad "No signal input" of doom...my keyboard and mouse seem not to have any signal aswell... they dont light up. In fact, I cant do anything... the computer however seems to run normally, no wierd noises, all hardware seems to run.

what do you advise?

Might be something with explorer. Possibly This is a result of some registry screwup somewhere caused by a conflicting piece of software or a virus. I remember something like this happening to me a while back, and it was one of the things i mentioned above but i dont remember which.

Bts whats the OS? I am guessing Win XP?


[EDIT]IGNORE THE ABOVE!!!!^^^^ i am an idiot who didnt read the post before replying. therefore my thing is completley wrong and i am not even talking about the same computer problem

1a - if your GPU is a dedicated card... pull it out and stick it back in...

1b - if your video chip is integrated . go on to 2a.

2a - [hoping you have more than one stick] pull out one memory stick at a time... say you have 4 memory banks [or slots whichever you prefer] and have 4 sticks in there [hopefully all the same brand] pull out all the ram modules... pick one and place it in bank 1... startup and test... if all is well... continue to 2b.

2b - Ok now if all is working... you need to test all the other bays to rule out a fried board or a fried slot... so use that same ram module on all the other slots until if you do find a bad slot... if they all work go to 2c. [if none work... try another memory stick, this will rule that memory module faulty if the other stick works...]

2c - Ok so all the bays work... so heres what to do now if your first memory module worked and you did not have to switch it for another module... this step eliminates the possibility of a faulty memory moduke [or stick whichever you prefer], basically repeat he process using one of the other sticks by trying it in any of the slots and then go on to the next one... hopefully you can narrow down a faulty memory module... they do affect integral video chips as the memory is shared. I have proof of this as a computer was brought into my shop the other day with this very issue...


ok if none of that worked... can you see the boot screens though?
if not it might be a faulty connection from the psu to your dedicated gpu if you have one...

or else if you can see the boot screen try launching windows in safe mode by repeatedly pressing F8 at boot and if you cant see anything fress down a couple of times and then press enter or pick SAFE MODE and see if it loads and shows stuff on screen if not I am too tired to write anymore lol well busy writing on my blog right now lol... part 3 of my game design project its a huge section so need to crack onto it asap!!!

Hope this helped...

Actually, thanks a lot for the detailed help information. I separated all the hardware and even disconnected DVD Drive and Harddrive...none worked. RAM, Soundcard and GPU do not seem to cause the problem, so either something on the mainboard or my processor is fried. Part of me is glad that none of my expensive new hardware is faulty, part is annoyed because the thing doesnt boot. To be absolutely sure, I even installed my old hardware... (graphics card, and old harddisk) still no luck.

And no, I do not see the boot screen, no output whatsoever.

looks like I have to buy some new hardware...but well, processor and mainboard where a little dated anway.

thx for the help

You might want to have the power supply tested just in case. I once spent a stupid amount of money swapping out parts for an unreliable computer when it was the power supply all along. A faulty PSU can make the computer act in weird and unpredictable and borderline racist ways.

IONSTREAM... I like you haha

Sounds like it's time for a new PC! Also, hi. It's been a while.

When you switch on, does anything happen? ie Fans/lights/etc?

IF (something happens and power is being supplied)
   Mr Valentine's procedure should have rooted out the problem
   IF Mr Valentine's procedure didn't
      You may have a fried board
      You may have a fried bios chip
      You may have messed up the bios settings and cause a conflict
         Try resetting your bios. Check your board's doc to see which pins to short to reset.
      Ionstream may be right about the PSU. Even if it seems to work.
         Check your ALL power connectors (many boards have multiple).
         Check you wattage. Low wattage PSU may not be enough for your hardware
      Does your machine go "beep-beep beep" at power-up?
         This is usually a faulty hardware indicator. Could be an onboard thing.
         Your CPU may be fried.
ELSE (If there is now sign of power at all
   Borrow a friend's PSU (check wattage is right), install it and see if that runs.
   IF the friend's PSU works
      Open up your PSU and check the fuse (little glass tube).
      IF the tube's filament is intact then can't help you.
      IF the tube's filament is fried, replace fuse.
   IF the friend's PSU doesn't work, your board must be dead.

Other things to try (If power is being supplied):
1. Remove all components in slots and apply medium downward pressure to all slots. Blow out slots afterwards. Reinstall components.
2. Check if BIOS chip is removable and if you can get a replacement at a reasonable price.
3. Check BIOS BATTERY (It's a round, silver thing that looks like a giant watch battery). If it is soldered down, carefully remove it with a soldering iron (DO NOT SPILL SOLDER ON BOARD). Now use(whatever method you like) to test if power is coming from it. It should be outputting the same voltage as it specifies on the battery (It it doesn't specify, it's a cheap generic batt. Most of them are around 6.5V if I recall correctly but my memory ain't so good on that, I'll be frank).
4. See if a friend will let you install your parts on his board.

If you have eliminated everything else, then I'd safely wager it's the actual board/cpu. If that it the case, get the BEST board you can that supports the FASTEST RAM and BEST CPU (check board's "socket". Even AMD are losing backwards compatibility with their newer chips). Toss old RAM if it's not compatible along with old CPU. Actually, tossing the old RAM if it's outdated may be good anyway. New RAM is cheap, even here in SA.

Final advice:
DO NOT BUY SECOND HAND PC PARTS UNLESS THEY'RE FROM REALLY GOOD AND TRUSTWORTHY FRIENDS. Better buy new stuff that's under warranty and that you know hasn't been screwed with. Good luck

I had similar issues when I last bought a video card. I didn't have enough power to run it and when it crashed, it completely killed my file system and ram chips. resulting in my machine being reduced to a non responsive block of metal.

edit:


unless you are a qualified electrical technician, DO NOT open up your PSU. They are dangerous even when not plugged in.
/edit

@Kezzla:
Yeah, good point. I didn't even think of dangers (I grew up surrounded by dismantled electronics).

@OP:
Yeah, just be careful about that PSU and DON'T touch anything inside. It's unlikely you'll get fried by just taking a peek, but be aware of Kezzla's warning. Actually might be better if you rather just leave the PSU to a friend who knows what he's doing. Better safe than sorry I guess.