Hi everyone,
I have a Toshiba U920T laptop that suffered a lot of water damage and is now dead.
There was lots of corrosion on the motherboard, specifically around the power input components but generally all over too.
So I have been playing around with it, I put the motherboard in some boiling water and scrubbed off all the corrosion I could see, then washed with some IPA, then put it in the over at 250C for a few minutes. Didn't work.
So I have been trying to test how far the power goes with a voltmeter, and straight away noticed it doesn't pass the first component. I have no idea what this component is, never seen one like it, it didn't have any markings on it or the motherboard. It seemed to have a plastic cap on the top that I popped off and saw it was some kind of coil, it has 4 pins, the 0V and 19V go in, and the 0V and 19V come out. I could see the copper wire coming out of the 19V was no longer connected, so I got a tiny bit of wire and connected the 19V in to a component on the other side of this coil.
To my absolute shock the small LED came on to say it was battery was charing, so I turned the laptop on and it actually fired up, I flipped it over to check the screen and there was a message about the RTC battery being low (as it was not plugged in).
The laptop was on for about 10 seconds before I unplugged it to put the SSD in and see if I can get it to boot to Windows. I have since not been able to get any life out of the machine, although I am sure i saw one LED flicker very briefly.
Does anyone know what this small component is that is broken? I assumed it would just be some kind of filter, and therefore bypassing it for a few seconds would not do much harm.
I have checked a few more voltages on the board, I am picking up a few 2V's, 3V's and 6V's here and there. There is nothing on the 4 p-channel mosfets though.
Thanks!
Graham
I have a Toshiba U920T laptop that suffered a lot of water damage and is now dead.
There was lots of corrosion on the motherboard, specifically around the power input components but generally all over too.
So I have been playing around with it, I put the motherboard in some boiling water and scrubbed off all the corrosion I could see, then washed with some IPA, then put it in the over at 250C for a few minutes. Didn't work.
So I have been trying to test how far the power goes with a voltmeter, and straight away noticed it doesn't pass the first component. I have no idea what this component is, never seen one like it, it didn't have any markings on it or the motherboard. It seemed to have a plastic cap on the top that I popped off and saw it was some kind of coil, it has 4 pins, the 0V and 19V go in, and the 0V and 19V come out. I could see the copper wire coming out of the 19V was no longer connected, so I got a tiny bit of wire and connected the 19V in to a component on the other side of this coil.
To my absolute shock the small LED came on to say it was battery was charing, so I turned the laptop on and it actually fired up, I flipped it over to check the screen and there was a message about the RTC battery being low (as it was not plugged in).
The laptop was on for about 10 seconds before I unplugged it to put the SSD in and see if I can get it to boot to Windows. I have since not been able to get any life out of the machine, although I am sure i saw one LED flicker very briefly.
Does anyone know what this small component is that is broken? I assumed it would just be some kind of filter, and therefore bypassing it for a few seconds would not do much harm.
I have checked a few more voltages on the board, I am picking up a few 2V's, 3V's and 6V's here and there. There is nothing on the 4 p-channel mosfets though.
Thanks!
Graham
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