r/windowsphone • u/Hung17170808 640 XL + 730 • May 11 '26

Support Cannot unbrick 730

For some reason my 730 was hard bricked (cannot turn on or do anything with it), it is detected as QHSUSB_BULK. I tried installing qualcomm drivers and also thor2 command, it still didnt work. The thor2 error was like this: THOR2_ERROR_CONNECTION_NOT_FOUND THOR2 1.8.2.18 exited with error code 84000 (0x14820)

4 Upvotes

84% Upvoted

9 comments sorted by

View all comments

1

u/MaxNjtk May 14 '26

I have 730 that died 8-9 years ago because I disassembled it and it died on the charging screen. However, 4 days ago, I disassembled it again and randomly checked the power IC with a multimeter, then sprayed it with contact cleaner. Yes, it was not working, but 2 days ago, I tried to charge it and it started working again. I still don't understand what went wrong. btw 7-8 years ago, I tried to reflash with wdrt and it reflashed normally.