PC powers on, but no beep or display at all! Please help.

[fsuorange]

Hello when I turn my system on it now powers on with fans but no beeps and no display. Please help!!

I have an:
asus a7v mobo
asus video card
384 mb of 133 ram
400 watt power supply
dvd writer
cd writer
120 gb hard drive and another 40 gb hard drive installed



I installed a new hard drive and dvd writer on my system and it worked fine until now. The computer powers on all the fans working but there are no beeps that the speaker makes and there is no display at all. I tried replacing the video card with another spare but it makes a long beep followed by three short ones and still no display. It also makes these beeps when no video card is in the mobo. I am clueless as what to do. What is wrong with my system?

[King-Of-DK]

I have had a very similar problem recently,and it turn out to be a faulty AGP port,as i sometimes could get the PC to boot when tilting the graphicscard in the socket.. If this doesn´t help,then try and remove 1 item(Soundcard,DVD,CD etc.) at a time to see if that helps,last try and clear your cmos (look in you manual for mobo)

[redwudz]

The one-three beeps is a video card failure. Curious that works but you don't get the confirmation of post beep. First, make sure all cables, cards, memory, connectors are seated properly. What you describe is usually power supply or motherboard failure. Hope not. Next if no go, unplug all drives except the boot. If you can't get to the BIOS screen, it makes it hard to diagnose. From there, you either test the PS or substitute a known good one. Next is MB failure, unless I've missed something obvious. Good luck.

[pixel]

I have the exact same issue as that whenever I usually mess about inside my PC.

I always find that it is the RAM so i just take it out and reseat it and it boots up fine.

I guess different motherboards will have different issues, so try reseating everything first before trying to swap in other components.

(BTW, try clearing the CMOS first, but if that doesn't work still try reseating everything because clearing the CMOS doesn't always fix the problem.)