Question about Toshiba Satellite A105 Notebook

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Toshiba Satellite A105

My computer will not turn on even plugged in to the ac/dc adapter. It gives no indication it is receiving power. No LED indicator lights come on indicating a power connection. I know my ac/dc converter is working. I have checked the connecter power jack and it seems fine. What could be the problem???

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  • Anonymous Feb 09, 2008

    Yep.had the same sort of problem. Machine out of warranty. Started having intermittent problems months ago. Just got around to attacking it. Disassembly proved internal harness to be good. Had already checked/tested ac/dc power adapter. (good) Visual inspection of MB connector for harness found discoloration. Further inspection found MB mating connector NOT soldered to MB (should it be?) I actually removed the connector by just lifting it out. Made it work on the bench by cleaning & refitting to MB. I then soldered the thing to the MB.

  • Max Douglas
    Max Douglas Feb 10, 2008

    Thank you for your suggestions. I opened up my laptop and examined the motherboard. I have the Toshiba Satellite A105-S1013 System Unit. The power connector is not attached or soldered directly to the Motherboard (MB) in this unit. It is fitted in a slot and attached to the MB via a cable or small power cord that is plugged into the MB. Should I disconnect it and clean it and then try it again? I am not sure whether my battery is working at all. For quite a while my battery has only held a charge for about 30 minutes, but leading up to the complete power failure problem it seemd to be holding a charge for less and less time. It was only while reading some forum posts recently, in an effort to learn more about my current problem, that I found out that the battery problem might have been fixed with a BIOS update available on the Toshiba website. The power failure occured while I was watching a DVD on the laptop. I wasn't monitoring the power light indicator because the laptop was plugged directly into the AC adapter. At some time while I was watching the movie the computer just lost power and it was then that I noted the power indicator light was off. I tried taking out the battery and then pressing the power button for 20 seconds then plugging the laptop back directly into the AC adapter and then trying to turn it on again. Nothing happened and still no indicator light. Do you have any other suggestions? Could my RAM chip have failed? Should I try buying a new power connector and replacing the original one before I take it to a computer repair shop?



    Respectfully submitted,



    Max

  • nwilson May 03, 2008

    I just experienced the EXACT same failure on my A105-2071. The power jack is NOT soldered directly into the motherboard as in older models - it has wires running from it to a connector on the motherboard. All connections seem to be fine. I'm stumped.

  • Anonymous Mar 25, 2014

    Power supply connected, led light at front indicates power to the unit but absolutely no power up whatsoever, no what combination of buttons are pressed

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  • 181 Answers

The most common problem on these units is the ac connector solder joints break away from the motherboard. If you're sure the ac adapter is working, and the correct one, and it's not charging the battery (assuming the battery is good), it's most likely the problem. They don't have to appear loose to be loose.
Otherwise, it's motherboard time, or a loose screw, etc has caused a dead short on the board.
Good luck, if you have additional info, let me know.

Posted on Feb 09, 2008

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My toshiba satellite pro doesn't work , even with charger in , it doesn't turn on , its like all the power is gone :o ?


You may have a bad DC connection:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
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If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it

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1 Answer

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1 Answer

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try looking at the DC input. My brother's 1st laptop had that same problem. All we need to do is solder it. Remember-1st dc connection, not the one on the MB.

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Also, can you remove all but 1 piece of memory.
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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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