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[FAQ] IBM ThinkPad Unlock Supervisor Password

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allservice
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PostPosted: Wed Apr 19, 2006 8:23 am    Post subject: Reply with quote

Yes, it works.
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icse
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PostPosted: Mon Apr 24, 2006 3:50 pm    Post subject: Reply with quote

Hi AllService, Thanks for your info. I like to build the reader but I can not found MAX232 or MAX232A, I only can get MAX232CPE, can I use it with 1uf Cap instead?
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allservice
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PostPosted: Mon Apr 24, 2006 4:31 pm    Post subject: Reply with quote

Yes.
MAX232ACPE - 0.1uF
MAX232CPE - 1uF

1uF/50 should be small enough.
Look out for the cap. polarity. C4 and C5 have to match the V- and V+ IC pins:
C4 (+) --> MAX232 pin#2
C5 (+) --> circuit GND
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PostPosted: Mon Apr 24, 2006 5:06 pm    Post subject: Re: Confirmed Working For Ibm T40 2373-hh1 Reply with quote

ibecamemad wrote:

what i can offer in exchange for now is for me to post an illustrated guide for other t40 users! (i.e. the location of eeprom, images of the interfaces built & so on!)



This would be really helpfull as I need to remove my T40 POP and need the location of te eeprom

Thanks for a great discussion forum
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allservice
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PostPosted: Mon Apr 24, 2006 6:45 pm    Post subject: Reply with quote

To get access to eeprom, dismantle the keyboard, palmrest and WIFI card if necessary. For T4X, the eeprom is near Intel Soutbridge chip and it is 8 pin ATMEL 24RF08. Exactly under the touchpad buttons if you follow the direction.
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PostPosted: Thu Apr 27, 2006 1:50 am    Post subject: Reply with quote

allservice wrote:
Yes.

Look out for the cap. polarity. C4 and C5 have to match the V- and V+ IC pins:
C4 (+) --> MAX232 pin#2
C5 (+) --> circuit GND


please confirm the following

C1 (+) --> MAX232 pin#1
C2 (+) --> MAX232 pin#4
C3 (+) --> MAX232 pin#16

thankyou in anticipation
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allservice
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PostPosted: Thu Apr 27, 2006 5:39 pm    Post subject: Reply with quote

You got it.
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bakzer
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PostPosted: Tue Jun 13, 2006 2:02 pm    Post subject: error 188 Reply with quote

Hi

Just got a thinkpad A22m
it comes with error 118 every time i boot.
I'm able to get around this error and force the machine boot on my HD, but still it's annoying.

Is there any way to correct the problem, without tearing the computer apart ?



br
Bakzer
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allservice
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PostPosted: Tue Jun 13, 2006 2:21 pm    Post subject: Reply with quote

I think the error is 0188- CRC2.
In this case the eeprom content must be fixed and reprogramed with W24RF08.
Sorry, you need to partialy dismantle the laptop to get access there.
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PostPosted: Tue Jun 13, 2006 5:13 pm    Post subject: Reply with quote

Sorry, you are right, Allservice. It is Error 0188.a
But not CRC2, only "Invalid RDIF Serialization Information Area"

As I wrote, it's possible to bypass the error, so i did that and upgraded my bios to newest version.
In the bios it seems like it's possible to clear RDIF, but No.
Before that I had Error 0188 also with CRC2 error, now i only have 0188.a

I had hoped that would help, but I can see that I have to follow your instructions

BR
Bakzer
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allservice
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PostPosted: Thu Jun 22, 2006 1:14 pm    Post subject: Reply with quote

It is 0188- CRC2, only that the error text has been changed in the new BIOS code.
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mk77b
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PostPosted: Fri Jul 07, 2006 6:58 pm    Post subject: a22m error 175 crc1 Reply with quote

I have a a22m thinkpad with error 175 .
I read the 24rf08 chip but i don't have another thinkpad to get a new dump.

can someone out there email me a dump for this machine type?

Can allservice correct these errors?

how much cost this ?
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allservice
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PostPosted: Fri Jul 07, 2006 7:03 pm    Post subject: Reply with quote

This is a free forum, I don't sell services here.
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hadakajime
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PostPosted: Tue Jul 11, 2006 3:00 pm    Post subject: Reply with quote

hmm, the only chip i can find that resembles 24rf08 is a '74af lm56 CIM'
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allservice
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PostPosted: Wed Jul 12, 2006 1:34 am    Post subject: Reply with quote

The eeprom is a Microwire 93C46. It is noted C46xx.
Maybe this one will help you better:
http://www.allservice.ro/forum/viewtopic.php?t=200&highlight=93c46
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hadakajime
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PostPosted: Wed Jul 12, 2006 6:00 am    Post subject: Reply with quote

haha u were right, cant miss it, found it in 10seconds.

73af 93c46 m8

do i realy have to unsolder it? Shocked


Last edited by hadakajime on Wed Jul 12, 2006 9:54 am; edited 1 time in total
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