Dead T42p. Help needed

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NorrisCell · #1 Post by **NorrisCell** » Mon Nov 24, 2008 5:15 pm

One minute, typing on it normally. Then it powers off completely. No Windows shut down, nothing. Now it doesn't respond to anything. Pulled the AC and battery, plugged each one back in on its own. When plugged in, it won't light the charging light. Any insight? I'm praying it is just a fuse, although it will still be a pain to get to.

Thanks guys.

zdriver · #2 Post by **zdriver** » Mon Nov 24, 2008 6:55 pm

Does not sound good, but pull all the usual suspects - wifi card, hd, dvd, BT / modem, even the ram, and finally temp unplug the lcd to see if it will power on.
Sounds like a component failed and is holding down the power supply. Hopefully it is not the mainboard.

NorrisCell · #3 Post by **NorrisCell** » Mon Dec 01, 2008 6:23 pm

No luck there. Looks like it's time to strip it and check fuses. Anyone have insight on checking MB fuses? I've never had to do it.

sparta.rising · #4 Post by **sparta.rising** » Mon Dec 01, 2008 6:30 pm

The fuse diagram can be found on the board with a little searching. To check the fuse, take a multimeter and set it to an Ohm setting. Place the probes across the terminals of fuse. If it shows zero, the fuse is good (no resistance across the fuse means its intact). If the reading is high, the fuse is bad (usually infinite resistance across the fuse means its broken, no current can pass). With the Ohm setting, start low, go up higher until readings are easily discernible.

ajkula66 · #5 Post by **ajkula66** » Mon Dec 01, 2008 8:19 pm

Try the old trick: remove the hard and media drives, take the battery out and unplug the AC adapter. Press the "power" button 10 times in a row, holding it down 10 seconds each time and 30 seconds the last time around.

Plug the adapter back in and keep your fingers crossed...

Good luck.

Ralf Hutter · #6 Post by **Ralf Hutter** » Mon Dec 01, 2008 9:34 pm

ajkula66 wrote:Try the old trick: remove the hard and media drives, take the battery out and unplug the AC adapter. Press the "power" button 10 times in a row, holding it down 10 seconds each time and 30 seconds the last time around.

What is the technical explanation for what's going on by using this procedure?

ajkula66 · #7 Post by **ajkula66** » Mon Dec 01, 2008 10:28 pm

Ralf Hutter wrote:

What is the technical explanation for what's going on by using this procedure?

I don't believe that I've ever been given a proper explanation, but it's an old IBM procedure that I've seen bring machines from the dead...not always obviously.

My understanding is that it would have something to do with discharging any leftover current in the condensers and what not...

CRAZYBUBBA · #8 Post by **CRAZYBUBBA** » Tue Dec 02, 2008 6:58 am

Ralf Hutter wrote:
ajkula66 wrote:Try the old trick: remove the hard and media drives, take the battery out and unplug the AC adapter. Press the "power" button 10 times in a row, holding it down 10 seconds each time and 30 seconds the last time around.
What is the technical explanation for what's going on by using this procedure?

Based upon my experience with macs this is similar to the procedure that you do to reset the Power Memory Unit on a powerbook/macbook.

NorrisCell · #9 Post by **NorrisCell** » Sun Dec 14, 2008 12:21 am

Well, all the fuses appear fine. Reassembled it, plugged in the power adapter, and got greeted with the smell of burnt electronics.

Now I have to decide between buying a new MB and hoping it didn't toast any other components, or parting it out.

Anyone need a flawless UXGA LCD and lid?

independent · #10 Post by **independent** » Tue Dec 16, 2008 9:20 pm

I've PM'ed you. Might be interested in the whole unit dead and all..

Dead T42p. Help needed

Dead T42p. Help needed

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