Question about Toshiba Satellite M105-S3041Notebook

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I have a Toshiba Satellite® M105-S3041 and my toddler spilled juice on the keyboard and now it won't turn on. When I plug it in, the battery charges, and the blue power light comes on, but the screen stays black (no back light) and the hard drive light doesn't come on either. Any thoughts? I'm a tech and I know I have to take it apart, I was just wondering where I should start looking.

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  • 8 more comments 
  • Donna Sander Jul 04, 2010

    That would have been a great help...if it were the correct computer. I don't know what a portege M100 is, I know it's made by toshiba, but the parts are not even close to my laptop. I need manuals for a Satellite M105...

  • Donna Sander Jul 04, 2010

    I went back and checked again...I know the files and the download "say" it's a satellite M105 file...but when you open the documents, it's not.

  • Donna Sander Jul 05, 2010

    yep, I had that disassebly page already. it comes up on google search page 1. (wouldn't be much of a tech if I couldn't do a google search) ...well I got the whole thing apart and cleaned, I'm gonna put it back together and see if anything is different. The motherboard didn't look too bad. Most of the electronics on this machine are protected with plastic. Keyboard of course was a mess, and may not have recovered. Speakers were also a mess and I don't know if cleaning them ruined them permanently or not...but there was an especially big mess on top of, under, and in the switch plate that sits along the top of the keyboard, and has the power switch on it...so maybe i'll get lucky. If not, I guess I'll try a motherboard. We'll see how much is still broke after I cleaned the whole thing up with alcolhol. It would be nice if I could find a way to test it without reassemblying the whole thing...

  • Donna Sander Jul 05, 2010

    I gonna end up giving you an "A" for effort when this job is done, LOL.

    Yes, I usually do that with desktops, but I'm not quite that confident when it comes to laptops. I'm gonna assemble it, less the case screws. I think if still has a problem, it may be the switch plate. It was soaked with dried up syrupy goo...looks like maple syrup when it's sat for awhile. Before I took it apart, all the lights were working when I plugged it in, and the battery charged ok. Just nothing happened when you push the power button. I know that's not much to go on, but I'm hoping the motherboard is good. It had a couple of very small places on the edge where some liguid looked like it could have leaked under the hard plastic tape that covers most of the motherboard. Toshiba did a pretty good job of protecting it. I cleaned the switchplate, and all the switches "mechanically" work now...click nice when you press them, but who knows what's inside. They are soooo tiny.I don't see any evidence of electrical damage...no burn spots or anything, I know that doesn't mean much, but say a prayer if you're of the notion. I'm about 1/2 way done with the careful reassembly...putting them back together is even worse than taking them apart. I worked on cleaning it for about 8-10 hrs yesterday as I diassembled it...it was pretty bad. $250 if I get it to work though. I'll let you know what happens.Thanks for sticking with me.

  • Donna Sander Jul 05, 2010

    Well, powered it up, and NOTHING. I sure thought it was going to do something, but no go.They want $`100 and up for those used mobos. I can't believe it. Ok,I guess I'm looking for one.

  • Donna Sander Jul 11, 2010

    I am wondering...after I put it together and nothing was different, I decided to look closer. First of all, I ordered the switch plate, because that was really the only part that was literally "soaked" with wet sticky mess, and there appeared to be a burn mark where the board's ground contact spot was...but then I started looking at the power portions since even though it charges the battery, the machine get's no power to the rest of it...and one of the wires, one of two grownd wires comming from the power jack seems really loose. They are buried inside the jack and covered with shrink so I can't actually look at it unless I am prepared to put a new one, but I put a meter at the other end of the cable where the connector is soldered to the board, and I appeared to get 15V across the hot and ground pins, which is the rating of the AC adapter...do you think there is a chance the power jack solder connection could cause this? Right where the jack mounts inside the laptop, the wires immediatly make a sharp turn around a screw...180 deg. Am I just being hopeful? I think I'm going to order a power jack also...before the motherboard. How do I find where the bios recieves power on the board. I thought maybe I would be lucky and find a capacitor or something...I figure if other people repair these things, I should be able to somehow. (I got excellent advice on fixing my TV...)

  • Donna Sander Jul 11, 2010

    :-) That sounds like a good practice to me. Ok, here's your points bro. I've made you hang in there long enough I guess. It would've been nice to determine where the bios actually is and where it gets it's power from...But the switchplate had a decent amount of circuitry also...maybe I'll get lucky. Waiting on UPS now...Something should arrive tomorrow.

  • Donna Sander Jul 12, 2010

    OOOORRR....if there is a particular section of the motherboard that is identified as a power supply section? Or is the AC adapter, the power jack, and the battery just "it"? ...geez, desktops are so much easier...

    It would be nice if it had some big fat electrolytic capacitors on it that one could just "look at" and indentify the issue like I just did on my flatscreen, LOL

    It's nice of you if you want to and have the time, but don't feel obligated if you are pressed for time.(You do sound like you enjoy the "figuring out part" though...)

    I saw both an S1021 and an S1054, and the motherboards did look the same. I wondered how many of them used the samme board...There is a nice 1054 I think on eBay...whole bottom half with a fingerprint reader and a camera, which this one doesn't have...only missing the screen and hard drive, neither of which I need...I wondered if I could put the monitor on it...it was under $100. I marked it, but it'll probably be gone by the time I get the cash together to order it.

  • Donna Sander Jul 12, 2010

    I can't see it...when you have time, do you think maybe you could upload a larger version of it to photobucket or tinypics? Or email me a file? donna@every-thing-it.com

  • Donna Sander Jul 12, 2010

    You found it "on" the motherboard?

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  • 2,600 Answers

Most likely you are going to need a motherboard, depending on the model, under the keyboard is the palm rest assembly...most of these have many opening in them that will allow fluid to get directly to the motherboard and they do not do well with liquid spilled on them when they are energized. Below is the link to the service guide for that model. I usually get my mobos on Ebay, but there are other sellers to grab one from.

http://tim.id.au/laptops/toshiba/satellite%20m100.zip

Posted on Jul 04, 2010

Testimonial: "ParrotheadPC has really great hanging in there with my questions. He obviously has experience repairing laptops. I'll look him up in the future. (Him? Her?...we do make a lot of assumptions, don't we?) Thanks for all the advice.."

  • 6 more comments 
  • Chip
    Chip Jul 05, 2010

    I'll seee what I can find out......

  • Chip
    Chip Jul 05, 2010

    Try this link, it is an illustrated guide to the disassembly....



    http://www.irisvista.com/tech/laptops/To...

  • Chip
    Chip Jul 05, 2010

    You should be able to just assemble the parts on a clean desk without using the case, I usually use rubber standoffs with slicky on one side to elevate the assembly off the desk for cooling. Most of the components do not need the case to test under power.

  • Chip
    Chip Jul 05, 2010

    I feel your pain brother...there have been many a time when I thought it was a small problem and would actually hope that it was just the circuit board that held the power button....but then it would end up being the power circuitry on the motherboard. Spill damage is the worse because you can't track down all the damage that has been done...kinda like tracking leaking water in the trusses of your home. At least you have visual references from the syrupy look. You may know this or not but instead of buying a motherboard, there are a lot of sellers and stores on E-Bay that have the entire bottom case and mobo without the screen. Sometimes it is possible to pick those up for under $100 bucks. Anyway, good luck to you ingetting it up and running. Chip

  • Chip
    Chip Jul 11, 2010

    Anytime I have a power issue, I change out the jack regarless of the other findings. The jacks are cheap and in the case of your laptop, they are already connected to a cable so you don't have to worry about soldering. Below is a link to a jack and cable on Ebay. In the end, you may end up changing the mobo, but it's fun getting there. I don't have schematics on the mobo and it circuit pathways, if it gets to that point for me it is more cost effective to change out the board. Good luck

  • Chip
    Chip Jul 11, 2010

    Most of these Toshiba M class of laptop use the same motherboard. I'll see if I have a picture and component schematic of a toshiba mobo so we can see what the BIOS chip looks like. I'll get back to ya.

  • Chip
    Chip Jul 12, 2010

    Found this illustration of the front side of the board. The letter "V" points to the BIOS chip. This is the closest thing I can find.




  • Chip
    Chip Jul 12, 2010

    You are very welcome....Chip Hackney

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