I am having a problem with my laptop (Toshiba L505D-S6948, AMD Processor, running Windows Vista Home Premium 32-bit, 3GB RAM - 1 2GB chip and 1 1GB chip).
A few days ago, the machine started operating very slowly and I was getting some funny messages from my Norton Anti-virus program. I don't recall the exact text of the message, but the word "infected" appeared.
I ran a full scan with that same Norton program but nothing was detected. I then tried to run MalwareBytes and got the blue screen saying the computer was shutting down to prevent damage. This happened twice. The message disappeared before I could print it out (computer reset) so I don't know the message details. I set the computer aside.
Today, I tried to use the computer and noticed the screen was blank. I did a hard shut-down (with the power button) and then attempted to restart. The cooling fan will come on, and that's it. I cannot boot in Safe Mode, and the BIOS screen does not come up. I have a completely blank screen. I don't even get a beep from the POST test. The indicator light for the HDD will not illuminate.
To troubleshoot the issue, I have:
* Tried to start in Safe Mode as noted above.
* Tried to plug-in a known good monitor to the VGA port (in case this was a display issue)
* Unseated and reseated the HDD
* Unseated and reseated the RAM chips.
* Tried booting the computer with only a memory chip in the first slot (did this twice, once for each chip).
I have not added any new programs or hardware to the laptop for most of a year. Nothing has worked. Is there anything else simple that I can try to see if I can get this machine going? It's old but did the trick so I really don't want to buy another.