need some help!! my brother has my former pentium 4 well i installed some new ram the other day not sure if it has anything to do with it. he shut down is pc the normal way and when he started it up 1 hour later ,it fires up but thats about it nothing on the monitor (no VGA input) tower not doing anying at all no loading, just power. if anyone knows what is going on it would be much appciated thanks
Basic rule of troubleshooting: If something is working and you add/do something new and it stops working, BACK UP!
You may have disturbed the cabling in your case.
You haven't included system specs.
What happens if you pull all of the memory out and try to boot? If motherboard, CPU, and PSU are working, you should hear a series of three long beeps indicating serious memory problems (like it's mising).