i have just got myself a T5500 after owning a T3400 for years....
Anyway after first plugging the T5500 in it all powered up but with an error on screen saying chip-set 2 fan in-op,
(unit was very dusty and stood for a while) i stripped and cleaned and all worked ok when started up..
Now because it had been stood i decided to check for updates and it came up with a bios A11 update so went ahead, then nothing, it just sat there with all fans working number 3 &4 soild and no power to screen, mouse and keyboard, can anyone give me an idea as i have tried everything ie. battery removed replaced jumpers etc etc..