Factory repaired Motherboard

[scr71822]

I picked up a used system with bad video and the board had the IBM Serviceable Used Part sticker on it and on the back near the Fan cutout is some sort of factory repair I guess, off the ADP3205. There is another jump near the USB ports. Anyone see this before?

http://s680.photobucket.com/albums/vv16 ... 03668s.jpg
http://s680.photobucket.com/albums/vv16 ... 03671s.jpg

[RealBlackStuff]

Not seen before, but that's the type of repair that could be made for having power/charging problems.
Don't think that's an IBM job though, they would supply a new mobo.

[richk]

I've seen this sort of repair many times. At one point, I had 2 T60 boards with the same part with the exact same mod. It looked like the repairs were made by 2 different people. (There were small differences in the way the jumpers were run.) My assumption was there was a problem with an early design of the way the traces were run.

[SMA]

I doubt that this is a modification.
My guess is that this is a repair and that some component had burned away. It is not that uncommon to loose a trace or two in such cases.

The ADP3205 chip is the Core Controller and the 10 legged chip in the lower left corner of the picture works together with the ADP3205.
I am unable to read the type number from the picture, but it might be an ADP3415, MOSFET Driver. There are two of those. A small part of the
second one can be seen in the lower right corner of the picture.

And by the way. Doesn't both links in the initial post point to the same picture?

[richk]

The T60 boards I talked about had the similar sort of modification (yellow jumpers, neatly run, with a sealer over the ends) I checked and I still have at least one of them. They had the same FRU, the same mod, the same month and year of manufacture and they appeared to be "from IBM". (no serial number or UUID filled in yet)

[scr71822]

I doubt that this is a modification.
My guess is that this is a repair and that some component had burned away. It is not that uncommon to loose a trace or two in such cases.

The ADP3205 chip is the Core Controller and the 10 legged chip in the lower left corner of the picture works together with the ADP3205.
I am unable to read the type number from the picture, but it might be an ADP3415, MOSFET Driver. There are two of those. A small part of the
second one can be seen in the lower right corner of the picture.

And by the way. Doesn't both links in the initial post point to the same picture?

Yep, just fixed the link. Thanks.

[rkawakami]

I would say that if one finds two boards with the identical "patchwork", then what you are probably looking at is the result of a factory Engineering Change Notice (ECN). Such a change would take place after the initial design process was completed (motherboard layout finished) but a problem was found after manufacturing had begun. In order to prevent scraping the entire board, the manufacturer comes up with a fix that can be manually applied; in other words, human assemblers that will solder parts onto the board. Some changes are as simple as cutting an existing trace and/or adding some wires between components. Other circuit corrections may require new components to be installed. These changes would then be designed into the next revision of the board.

[SMA]

The second picture shows a modification. 4 resistors has been added.
Could that be all it takes to fix the well known T4x usb2 problem ? Just 4 pull-up resistors !