I'm not very tech but I do have some computer repair books that I keep around.
I'm running an older laptop (Presario v6000), to practice on.
I installed a formatted HDD yesterday. To check it out I installed Win XP. Everything went good.
I had been using a bootable DVD Linux, a few times, w/o the HDD installed and it worked good.
Today, I thought I would try installing Ubuntu.
Instead of repartitioning with DISKPART, I opted to let Ubuntu install inside of XP.
The installation started & asked to reboot. That got me into a MEMORY TEST that I know nothing about. It ran for 1.5 hrs. All along it said, test complete w/ no errors. Pass 3 Test 7
I thought it may have been in a loop & pressed ESC to reboot.
Now, I think it was in the middle of repartitioning the HDD.
The screen is black & nothing is working. Is there anyway to restart anything?
As an outside chance... maybe something overheated. I found that a plastic bottle was getting a bit warm for an hr. behind the fan. I did have that back end propped up - as usual, to keep the machine cool.