Service Forum

victor · S.F. Boss Joined: 07 Mar 2004 Posts: 2581 Location: Staff

Hi,

1. Wrong eeprom pins, bad connections or bad GND.
2. Wrong interface. Please post some pictures of it, otherwise we can't help you...
3. Use native COM ports, not USB. I had to mention it.

Good luck!
_________________
Victor Voinea
ALLservice HQ, Romania.

bucksnort101 · Nou Venit Joined: 20 Feb 2009 Posts: 3

Not sure why it is not working, I quadruple checked my connections, even going as far as taking a multimeter toe them to verify contunuity. I took an old 9 pin to 25 pin serial connector and cut the 25 pin connector off, then metered the exposed wires per the diagram, then cut away the un-neaded wires.
Tried a second system as the Administrator system as well. Only thing I can figure is it doesn't like the particular diodes I'm using, or the removable security chip on the bottom of the system board is causing problems? I'm going to try to remove it next and see what happens.

victor · S.F. Boss Joined: 07 Mar 2004 Posts: 2581 Location: Staff

Forget the TCPA sub-board, has no relevance.
You have a bad circuit/port/connections. Without pictures, we can't help..
_________________
Victor Voinea
ALLservice HQ, Romania.

bucksnort101 · Nou Venit Joined: 20 Feb 2009 Posts: 3

Got it, bad ground on the serial port. Scrounged up another serial connector and it worked like a charm.
Thanks for the fix, otherwise it could have been a little costly.

ballymoss · Nou Venit Joined: 05 Mar 2009 Posts: 2

Hi Folks,

I cannot find the link for the pin outs on the DB9 connector any more.

Could someone link me please?

Kind regards
Ballymoss

bob · Posted: Thu Mar 05, 2009 10:27 pm Post subject:

Here you go Smile

ballymoss · Nou Venit Joined: 05 Mar 2009 Posts: 2

Thanks very much Bob, appreciate it!

Ballymoss

claudioggs · Nou Venit Joined: 14 Apr 2009 Posts: 1

Hi,
Many many thanks.
I recupere my old T23 !!!
I want to advice to others about the diferent keyboards.
the IBMpass Lite decript the password as QD;IN
But this password didn't work because my TP have a french keyboard (AZERT).
The IBMpass Lite decript for a US keyboard.
I replaced QD;IN for the leters in this position in a US keyboard..voilá
my password is ADMIN
I hope this help to others with non US keyboard.
Thanks again for all this info in your site.
Claudio

trizz · Nou Venit Joined: 22 Apr 2009 Posts: 1

I was given a T23 last week with a BIOS password in place that no one could remember what the password was. I came across this site while searching for a fix as pulling batter did not reset the password (as decribed above). I went to the local radio shack and bought all the parts listed (among a few other additions) and built the jig. To my amazement the process worked on the first try. Thank you for the info.

Not sure if anyone thought of doing this but i put in dip switches on the board so that i could solder the leeds to the TP and turn them on one at a time in stead of soldering them while the unit was on. worked like a charm… i will try and attache a picture if i can.

tweaq · Nou Venit Joined: 29 Apr 2009 Posts: 1

Well I followed the tutorial and it worked perfect. I have a thinkpad 760xl with a 93c46 eeprom. Got the password, put everything (mostly) back to gether, turn it on and get error 178. Thats a "eeprom is not functional" error. So is it dead or fixable?

victor · S.F. Boss Joined: 07 Mar 2004 Posts: 2581 Location: Staff

Some eeprom's leg got disconnected when you've desoldered the wires, or something.
_________________
Victor Voinea
ALLservice HQ, Romania.

slooper · Nou Venit Joined: 10 May 2009 Posts: 8

Hi, I have a thinkpad t61 with lost POP.
What means that: "For TCPA unlock, W24RF08 license and TCPA reset service are required"?

My Questions are:
1: All t61 have a TCPA-cryption?
2: Can i use this RS232-TTL as Interface to communicate with PC8394T-Chip (or t61 dont have PC8394T) for unlock?

hmm, I'm very unsure?
Thanks for victor, very good Tutorial and Support.
Sorry for my english! Smile

Best wishes from Germany!!

victor · S.F. Boss Joined: 07 Mar 2004 Posts: 2581 Location: Staff

slooper · Nou Venit Joined: 10 May 2009 Posts: 8

Hi Victor, Thanks for the Posting.
I have now dismantled my T61 and have located the Chip on the Backside of the Board.
It seem how the layout on the "ThinkPad Unlocking Software-News" Topic named: Alternative Layout. Smile

It's the P24508-Chip (passphrase or not passphrase, hmm?).
I have upload a Photo here: My TP 61 Backstage

Sorry i have many Questions Smile

, but i dont have understand your Answer nr. 2; This Interface here is not equal with your driven i2c interface, because the Values of the C's are 10uF and in your Blueprint 0,1uF. Is that ok?

Thanks, Slooper

victor · S.F. Boss Joined: 07 Mar 2004 Posts: 2581 Location: Staff

Use the interface exactly as per my pdfs, simply as that.
_________________
Victor Voinea
ALLservice HQ, Romania.