I recently upgraded the RAM on my PC from a 1gb Kingston value ram module to a 2gb Kingston HyperX module. I realised soon after purchasing the RAM that by using a single module I'm preventing the use of dual channel memory so my system runs in single channel mode - no worries, my own stupidity...
My first mistake was to not reset CMOS, so I had initial problems booting the PC. I moved the RAM to a different slot and it worked OK and has been for 2 weeks. I recently loaded up and after the Windows loading screen I was displayed with what looked like a psychedelic version of a DOS error message (it wasn't displayed correctly - diagonal lines etc). I did some research and decided to reset CMOS. It worked! PC loaded fine and I used it for a whole weekend without turning it off.
I use the PC solely for producting music, and I have been offered the chance to have my track played next week by a DJ friend of mine in Denmark, but I need to finish it first!
Anyway, I booted it up this morning and was presented with a black screen. The power supply is fine - fans all work, it just through a cycle of accessing each CD-Rom drive and the hard drive light remains on constantly - but just a black screen.
I tried resetting CMOS several times and even removed the battery for an hour or so. No luck. I replaced the new ram with my old module and it booted into CMOS where I changed a few settings (probably a bad idea - but one setting which I enabled described itself as providing better support for different RAM - seemed logical to change it). I loaded into windows fine then shut down and put the new RAM back in without resetting CMOS. Again - the black screen.
So I resetted CMOS and put the old RAM back in and I still have the black screen!!! So nothing works now, not even my original setup!
What have I done and how can I fix it? Surely the new RAM is ok if it's been working for almost 3 weeks???