hi
i need some help locating the eeprom on the circuit board shown below. **broken link removed**
that circuit board is from a Li-Ion battery used for the psp.
Once i find the eeprom, i need to pull out the GND pin from it so that the eeprom is disabled and so the microcontroller returns a serial number of 0xFFFFFFFF to the PSP, which then goes into service mode. Once in service mode i can install custom firmware on to the psp.
ok the one shown above is pretty much busted by now(tried some unorthodox ********)
i do have another battery and i'm looking forward to do the same thing with it too( i mean deactivating the GND of eeprom)
here are the pics
**broken link removed****broken link removed**
now you can see that the pin is already removed and also i smoked it aswell! but that's alright as it didn't cost too much....i need some practice with this before i get another one
I'd guess pin 1, in the bottom left, since its hooked up to that big plane. Hook up a DMM between a known ground plane and pin 1, and see if you get any voltage reading - if you do, its not ground, if you get 0v, its ground.
And guys, he's looking to remove the leg to get the PSP into recovery mode, but if you cut the trace, youre going to have to fix it. Seems easier to take the chance and lift the leg, since its a lot easier to put back.
And guys, he's looking to remove the leg to get the PSP into recovery mode, but if you cut the trace, youre going to have to fix it. Seems easier to take the chance and lift the leg, since its a lot easier to put back.
actually cutting the trace is a lot easier (and safer from my personal experience) since we can retrace it with any lead pencil.
ok thanks with all that help, i guess now i know how to figure out the GND pin
but it doesn't end there.....i'd like to know how to identify the particular eeprom to be modified on any psp compatible battery so that i don't have to look all around the country for an original battery from sony
I personally feel safer lifting the leg than cutting traces but thats just me.
As for modifying the EEPROM, I dont think anyone here would be able to help you. You need to have someone dump the EEPROM and decrypt it to know what everything means. Id try a site like psphacks.com
The people here could probably tell you how to remove the chip or read it while its on the board, and program it, but I doubt they know much about PSP Hacks
EDIT And why is it so hard to find an original battery? I can go to walmart or Zellers or Gamestop or Futureshop or Best buy... you get the picture, and get a battery.