Satellite S955 won't boot - no POST and black screen

Hi
I've a problem with my s955 (14 months old). It is not able to boot anymore. when switched on I can hear only cooling fan spinning up and down and nothing more. Last time it took almost half an hour to bypass this failure. When it's on it does not show any problem at all. When you switched off it's better praying. Now it seems gone. After an hour I cannot see any sign of life except cooling fan activity.
I went thru all the tricks mentioned in another Toshiba forum like power off, take out the battery, keep and hold the power button for at least 60 seconds. I even replaced the internal li-ion rtc battery but with no luck. Because it's not covered by guarantee anymore I opened it. No sign of burnt except a suspicious oxidization of some contacts.
I've contacted Toshiba Italy (even though this is a USA model) and I'm waiting for a possible answer next week. I ran out of possible solution except mobo replacement. Is there anybody around who did face the same issue? Could you please give me an help?
Thanks and best regards
Pyder

Hi, no news from Toshiba Italy but I've found a Toshiba authorized workshop that can possibly fix this problem. It seems that, beyond other speculations, the problem can be originated by the mainboard power microfuse (read this interesting reply by maxtek73 [http://forums.toshiba.com/t5/Batteries-and-Power/My-Toshiba-Satellite-Laptop-Will-Not-Turn-On/m-p/584008#M11147] at the end of the post). It seems reasonable. Actually, keyboard, dvd player, battery charge, hd and cooling fan are powered up by the mainboard; it seems that there is not enough current to pass initials tests before the POST. That could explain why the cooling fan is trying to spin up at max speed but it cannot. Id remind that at power on, any IT equipment push the fans at max speed and then slow down at normal rate before going into POST process. Ill have a talk with the workshop technician and Ill keep you informed.
Best Regards
Pyder

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Follow @LenovoForums on Twitter!

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