I have a 3yr old Toshiba notebook (5205-S703) that suddenly died on me.

In the middle of a presentation, the system simply locked up hard and I

had to hold in the power button for 10 sec to power it down.  Since
then it will not power up.  The Power Light comes on, but the system
will not post and the screen, drives and wifi remain in a powered off
state.  I then have to hold the power button in for 8-10 seconds to
power it down again.  On very rare occasions, the backlight on the
mousepad might come on, and sometimes i even get the screen to come on
and try to paint the boot logo, but it has never completed a full post
since the day it seized.  I have had it apart looking for loose
connections, reseated all the cables, put the original OEM RAM back in,

reseated the hard drive, removed the 2nd drive from the style bay...
in short, everything I can think of to get the system to post.

The system board was replaced 3 1/2 months ago under warranty by
Toshiba for an unrelated issue (bad memory socket), but that was a
month before the warranty expired and now Toshiba simply tells me I am
out of luck and refuse to help me...  in fact, they were extremely rude

about the entire situation.


Does ANYBODY have any ideas for me to try?  I have run out of ideas
myself.  If not, I could also use some recommendations on credible
repair centers I could send it to.