Gooday,
So I was recently trying to ugrade my RAM chips (SO-DIMMs) on my Acer Aspire 1420P. In the process I found that the new SO-DIMMs I had where DDR-2 as opposed to the DDR-3 that the Aspire is compatible with. So essentially I opened up the bottom panel only to put it back on again.
I then tried to reboot my machine but got a completely black screen when I pressed the power button. The two lights that flash are the 'num-lock' and 'cap-lock' lights at the top left. Then the lights that stay solid is the power light (beside the power switch on the right) and the ones seen below:

I have looked into many answers online and on these forums and none have worked for me. The fan is working, harddrive is spinning, battery charged and reinserted, also openned the bottom pannel again and reinserted my only SO-DIMM chip multiple times... Tried an alternative monitor, also alternative keyboard. Also, tried pressing 'F2' to see if I could make any type of noise from the BIOS, didn't work.
Also, I noticed that when the power button is pressed this an approximately 2 second delay before any lights are on (never happened before).
The OS I was using was Ubuntu 13.03 (Raring). If that is relavent at all.
Could this be a BIOS issue maybe something that could be resolve with something like this? http://community.spiceworks.com/how_to/show/22042-acer-aspire-one-black-screen-of-death
Thanks a lot to anyone who could give any type of help.