toshiaba problem update(Ritzema)

[ritzema]

Hi guys
Right here go's , I have a toshiba L450d whitch would not boot up in fact nothing except the green power on light, so I decided to strip it down to have a look after removing the keyboard & power switch ribbon cable & everything else I just thougt I would reconnect the power cable without screwing anything back together & lo & behold the fan started to spin but only for 5 secs, the cdrom made the normal sounds I got another green light showing & the battery light came on But NO DISPLY never even tried to boot from the hard drive ?. Anyway I screwed it all back together & tried to power it up but I was back to square one nothing except again the first green light. So I stripped it down again & attached power ribbon & I was back to lights , cd rom, fan.
I have left it at that just wondered if anyone can tell me what the fault is plz ?
cheers Guys

[Mickha]

With no diaplay it sounds like either a motherboard partial failure or CPU, did you try removing, and re-seating the CPU?
Try removing the memory, one stick at a time, if there are two sticks, and see if you get any error beeps.
Has anything got into the laptop, like a piece of metal, that can be causing a short?

Just re-read your post, have you tried booting up from the laptops battery?

[50pounds]

It sounds like the GPU this chip makes the picture disply on your laptop it might of overheated best bet is to dismatle all of your laptop take your time too.

next lift of the cpu heat sink and check the gpu/cpu for bubbles on the surface of it.

use a copper shim for the gpu to cool it down and also check the heatsink metal for dust backed up in it.

other than that before messing with your gpu check see if you can get a vga cable to another moniter to see if it works.

hope this helps.

[ritzema]

Thanks for that I havn't got to the cpu yet but will try t/morrow
Thanks