Question about Toshiba Satellite M35X-S149 Notebook

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Motherboard replacement Toshiba laptop

My 2 year old toshiba laptop will not turn on with power button with either ac power or battery power , power button does not light up. I'm thinking mother board problem , is there a web site or instruction manual for this ? and a source for parts ? Thanks for any help

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Re: motherboard replacement Toshiba laptop

Are you sure the ac adapter is providing power to the system? You should check it with a multimeter first before ruling out a problem with the system.

Posted on Jan 16, 2008

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I have a toshiba laptop about 2 years old. I didn't use it for a few days and now it won't turn on at all.

was it plugged in when you tried to turn it on?

if not, try charging it for a couple of hours. the battery must be completely empty

other than that I might need more details

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But First, Test Your AC Adapter - use a multimeter (available at any home improvement store for under $7)...

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When the AC adapter is plugged to the wall, if it has an LED make sure it is on, remove the battery and connect the adapter to the laptop, does it power up?
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If the laptop does not power up, the motherboard needs replacing.
I hope this helps to resolve your issue.
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1 Answer

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1 Answer

Toshiba Satellite Laptop Power Failure (A105-S1013 System Unit)

How handy are you with a digital multimeter? If the laptop is still disassembled, find the solder connections on the motherboard where the mini power cable enters the board from the jack. Plug the AC adapter in. Check to make sure you have the proper DC voltage at those points (should be about 19V, although the AC adapter should say what it's DC output is).

If you don't get any DC voltage (or too low), check the DC plug of the AC adapter. The inside of the plug should be + and the outside should be -. If you are getting voltage there, but not the motherboard, chances are it's the jack or the mini power cable on the motherboard. These can be replaced, it just depends on how confident you are about doing it yourself :).

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Toshiba Satellite Laptop Power Failure (A105-S1013 System Unit)

Okay, lets troubleshoot this:
1)Does your laptop run on battery alone ?
yes )test your jacks continuity to the motherboard using a continuity tester or Digital Multimeter.
a)test between the center contact and the motherboard.
b)test between the outside metal cover of the jack ,and the motherboard.
c)If either of these fails continuity,replace the jack.
2)does your laptop now power up on AC ?
No)Try the BIOS upgrade.

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