Actually, T43/p have been affected *worse* than the prior T4x machines when it comes to SouthBridge failures. They are fairly safe (unlike T40/41/42/p) when it comes to GPU getting de-soldered.
Some symptoms of SouthBridge failure include (but are not limited to) the following: a) Error 0200 on boot although the hard drive is installed, and tests OK in other machines. b) Erratic LAN and WLAN c) Erratic keyboard behaviour d) No audio And there's more... If you do some research on Bill Morrow's ThinkPad Forum, as well as on Lenovo's own, you'll find quite a few people who have reported "over-current detection" ended up having damaged SouthBridge chip solder joints... You'll also find out that there are not many people outside of IBM's repair centers who have seen/owned/worked on more T43/p units than silly old me. No, I don't believe in false modesty. Good luck. Cheers, George . -----Original Message----- From: Michael Schmitt <[email protected]> To: tataslon <[email protected]> Cc: thinkpad <[email protected]> Sent: Mon, Dec 12, 2011 5:48 pm Subject: Re: [Thinkpad] T43 2668 (266884G): hub 2-0:1.0: over-current condition on port 2 Am 12.12.2011 22:20, schrieb [email protected]: That sounds like a SouthBridge chip going south, pretty much all the symptoms are there. The symptoms for a fried / defect southbridge are afaik "unable to enumerate usb device" and not "over-current detected" messages and in addendum usb2 devices just working with ehci disabled in usb 1.1 mode but here all usb2 hardware works on all ports (which puzzles me a bit). And apart from that, fried / damaged southbridge on a T43 is somewhat unlikely (but not impossible for sure) as only T40 - T42 were reported to be affected in numbers. Your options are to have it professionally re-balled (no-reflowing of SouthBridge, unlike GPU) or have motherboard replaced. As said, I doubt it is the southbridge but for sure would a complete replacement of the mainboard solve the problem... at least most likely as it could be the case causing a short-circuit somewhere. ;) Good luck. Thanks, I hope others may suggest other possible fixes, or point out where to have a look at the mainboard. Cheers, George regards Michael -----Original Message----- From: Michael Schmitt <[email protected]> To: thinkpad <[email protected]> Sent: Mon, Dec 12, 2011 10:46 am Subject: [Thinkpad] T43 2668 (266884G): hub 2-0:1.0: over-current condition on port 2 Hi list. I have a T43 2668, the 15"/1400x1050 thing, running Debian GNU/Linux sid. It works in general, but battery live is not as good as it should be (around 2h with a "almost like new" battery). I guess the messages like hub 2-0:1.0: over-current condition on port 2 "spamming" my syslog may be the reason, most definitely a hardware issue. If memory serves right the message is / was not limited to port 2. Iirc port 1 messages were there too at one point or the other. I do get occasional hardlockups / kernel oopses every once in a while, I guess depending on the kernel version that varies from kerneloopses to screen-freezes with a nasty beep sound playing until powered down the hard way. I do not see the issue often known as the "flexing-issue" here as: 1.) has never been reported for a T43 2.) no screen flickering / errors. I think the T43 did work without lockups for several months and the lockups did happen later, but the "usb over current" message were there all the time. As this is not my only laptop, I did not bother much and just took another one for work. But now as another ThinkPad did fail me (see the next mail) after a hard 1,50m fall, I guess I have to stop breaking ThinkPads and trying to fix em again! ;) So for this little black beauty, any suggestions where to look for short-circuits / wrong wiring / broken connectors / whatever? I have never disassembled a thinkpad entirely (at least I had never the mainboard of one in my hand), but I did some minor hardware maintenance in the past and with the maintenance manual provided by IBM/Lenovo, I am confident to be able have a look at every inch of the inner guts of it if necessary. Any help / suggestions is greatly appreciated! regards Michae P.S.: wrong e-mail account used the first time... _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
