Lenovo T14 Gen1 i7 10 nm-C931 (brick)
Hey! I bought a Lenovo T14 Gen1 i7 10 nm-C931 (a brick). The previous owner said he got it on eBay as a password-locked device and took it to a repair service, where they tried flashing something. The result: it doesn't turn on.
When I plug in the charger, the charging LED lights up, and the power button indicator blinks three times.
I downloaded the firmware from the official website, but it's incomplete. However, there is a firmware for the embedded controller (MEC1663). I did a mass erase via OpenOCD, wiped MEC1663 along with the EEPROM, and flashed an image from the official firmware. The result: still a brick.
Anyone here knows what I could try next? 🤔
By the way, after flashing via JTAG, do I need to put back the resistor that enables JTAG?
I couldn't find the power-on sequence in the schematics, so I don't even know what to check… There's no activity on the SPI flash (bios) DO and DI pins—I checked with an oscilloscope.
When I plug in the charger, the charging LED lights up, and the power button indicator blinks three times.
I downloaded the firmware from the official website, but it's incomplete. However, there is a firmware for the embedded controller (MEC1663). I did a mass erase via OpenOCD, wiped MEC1663 along with the EEPROM, and flashed an image from the official firmware. The result: still a brick.
Anyone here knows what I could try next? 🤔
By the way, after flashing via JTAG, do I need to put back the resistor that enables JTAG?
I couldn't find the power-on sequence in the schematics, so I don't even know what to check… There's no activity on the SPI flash (bios) DO and DI pins—I checked with an oscilloscope.
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