Question about IBM ThinkPad T40 2373 Notebook
Yes. One possibility exists for you:
If the PSU (whatt you call adapter) has an internal fuse, you can HOPE it burned BEFORE any critical PSU components.
1 UNPLUG THE PSU from ANY AC/WALL SOCKET !!!!!.
2 Open the PSU, and look for one (or more) glass tubes located somewhere on the board. The fuse will be about .5cm (1/4 inch) in diamiter, and have metal caps on each end. (Looks like a small glass pipe bomb :)
3 If the tube is black inside or has dusty material visible, it is most likely blown, and you may be saved.
4 Regardless, remove any/all fuses by prying one end up (or desoldering, if it is soldered) and take the fuse(s) out.
4 If you know what a VTVM is (and have one) check the "continuity" of the fuse(s). The continuity should be ZERO Ohms, on any (or best, the lowest) Ohm scale. If it is null (or no continuity) then the fuse is blown. If this does not make sense, take the fuse to a radio or TV repair shop and have them check.
5. If the fuse was bad, replace it (clean receptacles with fine sandpaper if they are black/burned/dusty, and VACUUM any metal particles away) and reassemble PSU.
6. PnP (Plug in and Pray) Wish you luck! Let me know!
Posted on Dec 14, 2007
This is my 2nd try to post this ('fixya' needs somebody to fixIT)
This web site http://mayohardware.blogspot.com/2009/09/thinkpad-t40.html
talks about your problem, and the solution, which requires a new fuse, new MOSFET, and the ability to solder itty ***** solder pads!
Posted on Feb 16, 2010
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