IBM Thinkpad R52 Password on SYSTEM

[lorins_core]

IBM Thinkpad R52 Password on SYSTEM
even on Bios Setup can't Access Have Password

User or Owner He do not Know the Password?


I try to basic Troubleshoot. Dismantle Laptop Reset Cmos Bios using Remove the Cmos Battery also Discharge. No Luck

i think need to Clean the Bin File.

Here The Bin File




Tia

[MJ-meo-dmt]

Re: IBM Thinkpad R52 Password on SYSTEM

I think those have the Atmel chips there are usually two of them. Replace them both or the one closest to the BIOS region(circuit).
The way to do it is remove all power from the board esp CMOS.
Then replace the chips and then only start it with AC plugged in. Then check.

[SMDFlea]

Re: IBM Thinkpad R52 Password on SYSTEM

The password is stored in a secure chip such as PC8394T-VJG , https://www.allservice.ro/forum//viewtopic.php?t=47

https://www.badcaps.net/forum/showth...ghlight=pc8394

[lorins_core]

Re: IBM Thinkpad R52 Password on SYSTEM

I think those have the Atmel chips there are usually two of them. Replace them both or the one closest to the BIOS region(circuit).
The way to do it is remove all power from the board esp CMOS.
Then replace the chips and then only start it with AC plugged in. Then check.

Thank For You advice.

But they have no Atmel? the only Eeprom Chip or Bios what i saw is Prod Code 24C64WP?

It is a Same?

[SMDFlea]

Re: IBM Thinkpad R52 Password on SYSTEM

Try these scl sda points .http://www.ja.axxs.net/r52.htm

[MJ-meo-dmt]

Re: IBM Thinkpad R52 Password on SYSTEM

Uhmm. Are you sure? They aren't as big as the normal BIOS chips. They look more like the 8 leg/pin mosfet type.

Otherwise try the other way what SMDFlea suggested

EDIT: I see now that 24C64WP is the size that I'm referring to... Uhm even the schematic says there are Atmel chips x2.... Maybe they used those instead?

[lorins_core]

Re: IBM Thinkpad R52 Password on SYSTEM

Try these scl sda points .http://www.ja.axxs.net/r52.htm

I have a Question. need to used KMX1 Device. RT908F can DO That?

[lorins_core]

Re: IBM Thinkpad R52 Password on SYSTEM

Uhmm. Are you sure? They aren't as big as the normal BIOS chips. They look more like the 8 leg/pin mosfet type.

Otherwise try the other way what SMDFlea suggested

EDIT: I see now that 24C64WP is the size that I'm referring to... Uhm even the schematic says there are Atmel chips x2.... Maybe they used those instead?

Yes Sir i'm 101% Sure. wait I send The Image Later

[SMDFlea]

Re: IBM Thinkpad R52 Password on SYSTEM

I have a Question. need to used KMX1 Device. RT908F can DO That?

No you don`t need a KMX. With the 24RF08 or equivalent chip on some thinkpads you just need to short pin 5 and 6 together at the right time while booting up to remove the password. The R52 definitely uses the PC8394T ,and you can use any TTL device to read the chip ,using the scl,sda points. I made a
simple-i2cprog years ago, its easy to make.If the RT908F can read ttl try it.
To read the chip use R24RF08 reader and decode the password with IBMPass, if R24RF08 reader doesn`t work try the pc8394 tools

[lorins_core]

Re: IBM Thinkpad R52 Password on SYSTEM

No you don`t need a KMX. With the 24RF08 or equivalent chip on some thinkpads you just need to short pin 5 and 6 together at the right time while booting up to remove the password. The R52 definitely uses the PC8394T ,and you can use any TTL device to read the chip ,using the scl,sda points. I made a
simple-i2cprog years ago, its easy to make.If the RT908F can read ttl try it.
To read the chip use R24RF08 reader and decode the password with IBMPass, if R24RF08 reader doesn`t work try the pc8394 tools

Thank For That Sir. well can you teach me the Procedure. i need to fix this Laptop.

Thank Again

[SMDFlea]

Re: IBM Thinkpad R52 Password on SYSTEM

What bios programmer/s do you have .