Press power button, begins to power on, shuts off after about 5 seconds

Press power button, begins to power on, shuts off after about 5 seconds
sparrowpcAsked:
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BrianMilnesCommented:
Looks like a Toshiba hardware service call...
Brian
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
how far does it get in the boot sequence?
what screens do you see?
any noise?
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BrianMilnesCommented:
I'd suggest checking your ventilation. (e.g. Vacuum out the fluff.)
I recently set up a Toshiba, which would overheat at the drop of a hat. (The processor has an auto shutdown feature, to protect itself from overheating.)
If it's not the ventilation, has the heatsink become dislodged?
Brian
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sparrowpcAuthor Commented:
The LCD never displays anything, don't seem to get any output from an external monitor either.  After pushing the power button it will light up, the CPU fan spins, then the fan shuts off but the power light stays on.
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BrianMilnesCommented:
Are you getting any beeping?
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sparrowpcAuthor Commented:
No beeping
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Dominik_LCommented:
If You have a warranty just give this laptop back - let the service bother and fix it.
You might try to access BIOS (You must press F1 or F2 or ESC or DELETE - You must try or read the manual). If the LCD lights up and You'll be able to select and change options, check if there are options to turn off the machine for some reasons. If the machine will not power off by it self, than it could be a problem with hardware (motherboard, RAM, graphic chip) or compatibility (eg. when You have added another RAM stick).
If it's powering off, You can't enter BIOS and LCD isn't showing anything than I think its cheatsink problem. The radiator may not stick strictly with processor surface or the fan is damaged.

Hope it helps
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nobusCommented:
you can also try to run from battery alone, or from AC alone
try also booting with disk and cd drive removed - any display ?
or try even with ram removed - any beeps?
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nobusCommented:
...then the conclusion is a bad mob, or cpu  . .
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sparrowpcAuthor Commented:
I've tried to power on while completely stripped (no cd drive, HD, etc) to no avail.  

I did replace the motherboard and cpu - however I bought the mobo/cpu from and ebay seller and although the item is "guarenteed working," I'm not overly confident.
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BrianMilnesCommented:
If you're in time, I'd send it back for a refund. But do check the Toshiba warranty. I have had some success (LCD screen, HP SFF PC and other stuff) bought cheap from eBay but fixed/replaced under warranty.
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Computer101Commented:
Forced accept.

Computer101
EE Admin
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