Service Forum

[hptrauma]

Hi, I recently obtained an R51 thinkpad password protected, I am used to reprogramming atmel AT24C series eeproms, but did not do my research on the AT24RF08 on this model MOBO. I removed the ic to connect to my interface board and read the ic (saving the dump using "ponyprog") but could not decrypt the password. Attempted to erase/ clear buffer and re-write to the eeprom but ;of course, cannot write to it. I know I will need Victor's "W24RF08" to write but my main concern is when I re-installed the eeprom tothe MOBO, the PC will not boot OR give me any screen. It does power on but all I get is one short beep, a pause, 3 short beeps, a short pause, 3 short beeps, long pause and 1 short beep..........I re-read the eeprom and compared the dump to my first dump and they are VERY DIFFERENT.....obviously I corrupted this eeprom. My question is.....has anyone encountered this beep error? and will re-flashing the eeprom with the first (hopefully correct) dump allow me to atleast be able to boot to a password screen.
Also, I have re-verified all soldering and power/gnd is OK....PROT and WP check OK and with oscilloscope upon power up, SDA and SCL show brief data transfer.

[bob]

Southbrige 82801 balls bad contact or SMbus port signals blocked. Short on SDA or SCL maybe.

Video could give the above symptoms as well.

Ponyprog read with a lot of trash, specially on last offsets.