Problem 'No Video Output' - ????????????

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Dear All,

My PC will power up but return a 'no video output' to monitor

Have removed internal peripherals one by one up to RAM after which post bleeps returns RAM missing.
If I'm getting post bleeps at this point it suggests to me that mobo is working and all else fine and a good possibility RAM therefore faulty. Have tried placing DIMM in other slot to no avail. Have tried the rubber on contacts method to no avail. Have tried a new DIMM to no avail. No Graphics adapter - just on board - how then could I test on board graphics. Could it be the CPU. If suffered a power surge than presumably the board/components wouldn't even allow power up let alone return RAM missing / faulty post pleeps ?

Any Ideas will be greatfully received.

Kind regards

Co9

 

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A power surge can blow anything, from a USB controller to on board graphics (I had a blown USB controller before, the rest of the board was fine for years after that). The only way to really check the video is to use a seperate card and see what happens then.

It's unusual for faulty ram to cause you video issues tho, generally it will cause kernel panics in the OS and bluescreen \ not boot, rarely will it not give you any display.

 

Good info from Simon.

If your using onboard video and getting no display then the mobo could be shot, try a CMOS reset.

This is how you do it (if you don't know).

Unplug from the wall (not from the PSU).
Locate and remove the battery
Locate the jumper pins next to the battery (may be below and to the right, refer to the motherboard manual).
Move the jumper cap from pins 1 & 2 to 2 & 3
press the power button on the case to remove any residule power
Put battery back in
move jumper cap back to 1 & 2
Plug back into wall
Power on.

This should set everything back to default in the BIOS, if you get not luck with this the next thing to try is another psu (just because everything appears to be powering up apart from the onboard graphics does not mean the psu or mobo is ok).

 

Many thanks for this Simon. I was under the impression regarding RAM that it is required for video output - I have a feeling the RAM controllers for the slots are faulty not the dimms themselves as ordered in new to no avail (both slots). Also tried an old video card in a PCIe slot also with no video output returned to monitor.

Many thanks once again

Co9

 

Am trying the CLR CMOS route Bruce - have tried this before with the jumpers but didn't remove battery - No joy so will leave battery out for 48 hours as one other has suggested. Also - tested PSU - all voltages running & fine !

Thanks for your help Bruce

Co9

 

Problem Solved - Removed battery and jumpers for well over 48 hours then replaced - system now with initial post bleep and working as good as new with normal output to screen

Thankyou for your help and support!

Co9

 

Please see posts

 

Clearing CMOS can resolve many issues be aware though that this could indicate that the battery is on it's way out and may need replacing at some point in the future.