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    Unbrick Hp Mini 311 on the Cheap

    Discussion in 'HP' started by Nedemai, Jun 20, 2013.

  1. Nedemai

    Nedemai Notebook Geek

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    So I've recently aquired an HP mini 311-1025NR and through some bios modification managed to brick the thing. I set the clock settings too high and the thing decided it didn't want to boot anymore. After doing some reading it was obvious the only way to fix the issues was to get access to the SPI FLASH EEPROM directly.

    After digging on the internet I found a program called SPIPGM.EXE and a circuit to go with it. More information can be found about it here
    RayeR's homepage/Programming
    RayeR's homepage/Programátor SPI FlashROM na paralelní port

    Its a circuit that connect to a parallel port of a computer and the program runs in DOS on the host machine.

    It was very important to use 150 ohm resistances on the datalines. Since I didn't have four 150 ohm resistors I ended up using 470 ohm and 220 ohm resistors in parallel Req = (R1*R2)/(R1 + R2). The power source needs to be incredibly stable. I was messing around with a voltage regulator connected to the USB but in the end settled for a 3.3V CR3032 battery. All data lines need to be as short as possible! This was a huge issue for me since it also meant that the circuit would pratically hang from the parallel port.

    Here are images of the how the circuit looked in the end and of my success.

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