need m/b for a T43

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ajkula66 · #31 Post by **ajkula66** » Thu Jan 08, 2015 5:29 pm

A bad CPU will have board behave as a corpse. No sign of any life whatsoever.

I can send you a *tested good* T43 CPU if you run out of other options...with that said, I would tend to believe that your problem is elsewhere.

mikeh420 · #32 Post by **mikeh420** » Thu Jan 08, 2015 5:42 pm

I was planning on getting a CPU, but if you have one that is known to be working, I'm definitely interested.

Thanx

ajkula66 · #33 Post by **ajkula66** » Thu Jan 08, 2015 5:47 pm

Since you need it primarily for testing purposes, get the cheapest one...which would be PM 750 (1.86GHz) for $3 + shipping...I've got better ones as well, but these can be discussed once you actually have a working machine...

PM me and we'll take it from there...

mikeh420 · #34 Post by **mikeh420** » Thu Jan 08, 2015 7:39 pm

Besides the CPU, another part I've used on both boards is the keyboard. It also has 2 broken keys, right-cursor and the one to the right of it, I believe it's "next web page". Could it cause the problem? Also using the same modem card and same WLAN card. I can't think of anything else.

ajkula66 · #35 Post by **ajkula66** » Thu Jan 08, 2015 7:50 pm

Well, you can remove the modem and wireless card while testing...as for the keyboard: do you have another pre-T6x keyboard that you could plug in to test?

mikeh420 · #36 Post by **mikeh420** » Thu Jan 08, 2015 7:57 pm

ajkula66 wrote:Well, you can remove the modem and wireless card while testing...as for the keyboard: do you have another pre-T6x keyboard that you could plug in to test?

I tried it without the keyboard, using the dock station power switch to power up, still same result.

I checked my T42 keyboard, and it has a fourth threaded post and won't fit, the T43 only has three. Since the T43 keyboard has missing keys I had planned to get another one anyway.

ajkula66 · #37 Post by **ajkula66** » Thu Jan 08, 2015 8:05 pm

mikeh420 wrote:
I tried it without the keyboard, using the dock station power switch to power up, still same result.

Is all of this with or without the LCD assembly hooked up?

I checked my T42 keyboard, and it has a fourth threaded post and won't fit, the T43 only has three. Since the T43 keyboard has missing keys I had planned to get another one anyway.

You don't need to actually install the T42 keyboard, just lean it on the machine and power it on...

mikeh420 · #38 Post by **mikeh420** » Thu Jan 08, 2015 8:41 pm

tried the T42 keyboard, also removed the modem and WLAN card, still the same

I'll try running it with an external monitor without the LCD connected

#39 Post by **RealBlackStuff** » Fri Jan 09, 2015 5:24 am

One more test: try another power supply?

mikeh420 · #40 Post by **mikeh420** » Fri Jan 09, 2015 11:06 am

RealBlackStuff wrote:One more test: try another power supply?

Tried with just the battery, also just tried with my T42 power supply. No change.

mikeh420 · #41 Post by **mikeh420** » Fri Jan 09, 2015 12:35 pm

ajkula66 wrote:
mikeh420 wrote:
I tried it without the keyboard, using the dock station power switch to power up, still same result.
Is all of this with or without the LCD assembly hooked up?

I checked my T42 keyboard, and it has a fourth threaded post and won't fit, the T43 only has three. Since the T43 keyboard has missing keys I had planned to get another one anyway.
You don't need to actually install the T42 keyboard, just lean it on the machine and power it on...

this time I tried it with the LCD disconnected, no change, nothing on external monitor either

#42 Post by **RealBlackStuff** » Fri Jan 09, 2015 2:20 pm

I get the strong impression that either you have a bad CPU or you are consistently doing something wrong.
Take the mobo out of the chassis and lay on a flat table, e.g. on a big piece of carton, insert CPU, tighten the CPU-screw, apply thermal paste, attach fan with 3 screws, insert fan power-connector, attach the yellow DC-connector, connect speaker set, attach the VGA-connector strip, insert memory, attach keyboard, connect external LCD to VGA port, attach AC adapter and plug in.
Switch on. What happens?

mikeh420 · #43 Post by **mikeh420** » Fri Jan 09, 2015 3:36 pm

RealBlackStuff wrote:I get the strong impression that either you have a bad CPU or you are consistently doing something wrong.
Take the mobo out of the chassis and lay on a flat table, e.g. on a big piece of carton, insert CPU, tighten the CPU-screw, apply thermal paste, attach fan with 3 screws, insert fan power-connector, attach the yellow DC-connector, connect speaker set, attach the VGA-connector strip, insert memory, attach keyboard, connect external LCD to VGA port, attach AC adapter and plug in.
Switch on. What happens?

That's pretty much the order I am assembling it in, I using the Thinkpad Hardware Maintenance Manual for reference. I've tried it stripped of HDD, DVD, modem, WLAN card, memory one slot full, two slots full, none at all, LCD disconnected, no keyboard. Seems all that's left is the CPU.

Definitely not new at this, 20+ years of PC and IBM AS/400 setup and maintenance experience, with 10 years of electronic assembly/QC experience before that

mikeh420 · #44 Post by **mikeh420** » Sat Jan 10, 2015 3:39 pm

RealBlackStuff wrote:I get the strong impression that either you have a bad CPU or you are consistently doing something wrong.
Take the mobo out of the chassis and lay on a flat table, e.g. on a big piece of carton, insert CPU, tighten the CPU-screw, apply thermal paste, attach fan with 3 screws, insert fan power-connector, attach the yellow DC-connector, connect speaker set, attach the VGA-connector strip, insert memory, attach keyboard, connect external LCD to VGA port, attach AC adapter and plug in.
Switch on. What happens?

just set up as suggested, fan spins, nothing on monitor, no beeps

#45 Post by **RealBlackStuff** » Sat Jan 10, 2015 3:54 pm

From that table-set, only remove all ram, then try to boot.
It should beep 1-3-3-1.
If not, you might have yet another dud motherboard.
I still say: get another CPU.

mikeh420 · #46 Post by **mikeh420** » Sat Jan 10, 2015 5:59 pm

RealBlackStuff wrote:From that table-set, only remove all ram, then try to boot.
It should beep 1-3-3-1.
If not, you might have yet another dud motherboard.
I still say: get another CPU.

I knew I shouldn't have started re-assembling it...

My money is on the CPU too; all three boards, the original and the two I bought all exhibit the same symptoms. I could see two, but three is not very likely.

mikeh420 · #47 Post by **mikeh420** » Sat Jan 17, 2015 4:13 pm

It was the CPU after all. Just got a 740 CPU today, Windows is loading now. Had to use my T42's DVD, the one in the T43 wouldn't open.

Thanks everyone for all the help!

mikeh420 · #48 Post by **mikeh420** » Mon Jan 26, 2015 5:45 pm

Just installed the BIOS update (70ET69WW), it ended with beeping and an error message and in RED:

"ERASE FLASH MEMORY BLOCK FAILED", then "Use IBM Crisis diskette"

Scared the crapola out of me, but I rebooted the system and everything works, the 2010 error is gone.

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