After trying various approaches, it seems I've bricked my LV07 due to seeing the following in my serial console:
I (9874) self_test: 2 chips detected, 2 expected
E (9880) i2c.master: I2C transaction unexpected nack detected
E (9885) i2c.master: s_i2c_synchronous_transaction(945): I2C transaction failed
E (9893) i2c.master: i2c_master_transmit_receive(1248): I2C transaction failed
E (9901) i2c_bitaxe: Device TPS546 (0x24)
E (9906) TPS546: TPS546_check_status(738): Failed to read STATUS_WORD
E (9913) vcore: VCORE_check_fault(171): TPS546 check status failed!
E (9920) self_test: test_vreg_faults(184): VCORE check fault failed!
E (9927) self_test: VCORE check fault failed!
I (9932) vcore: Set ASIC voltage = 0.000V
E (9948) i2c.master: I2C transaction unexpected nack detected
E (9949) i2c.master: s_i2c_synchronous_transaction(945): I2C transaction failed
E (9952) i2c.master: i2c_master_multi_buffer_transmit(1214): I2C transaction failed
E (9960) i2c_bitaxe: Device TPS546 (0x24)
E (9965) TPS546: Could not turn off Vout
E (9970) vcore: VCORE_set_voltage(141): TPS546 set voltage failed!
I (9976) self_test: SELF-TEST FAIL -- Press RESET button to restart.
I then put the unit into flashing mode by grounding the IO pin & pressing the reset button, which returns:
I (9983) bm1366: Setting max baud of 1000000
I (10000) serial: Changing UART baud to 1000000
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x20 (DOWNLOAD(USB/UART0))
waiting for download
I've had very limited success with flashing my LV07 & have noticed a few 'Self-test: Fail' messages that only adds to my thinking the LV07 is bricked.
However, there is one firmware that seems to consistently work (inasmuch as the LV07 isn't acting dead i.e. black screen) when powered up after flashing using
https://github.com/un-painted/ESP-Miner-TCH/releases & the bitaxetool command:
bitaxetool -p COM7 -c config-lv07.cvs -f esp-miner-merged.bin
Fortunately, the above at least allows the LV07 to boot & display meaningful feedback on its screen. Also, having configured the 'config-lv07.cvs' file with my own wifi settings, I can also reach its web page showing 0 hashing rate, intermittent temperatures & voltages = not good!
I'm therefore getting to the point where I'm thinking that I may have indeed bricked my LV07. I'm a little surprised if this is the case, since I've only soldered on a small header to the JTAG pcb holes so I connect to my CP2104 UART to USB Adapter (which is working fine) & followed numerous tutorials & approaches (from here & youtube).
I'm now wondering if the original firmware might bring it back to life? Like others, I've been struggling to find the original firmware but am hoping someone might have a copy & am wondering if you'd be so kind to let me know if I can get a copy, or perhaps let me know of another source?
I'd love to get my LV07 back working again & would really appreciate any help.
Cheers!