patrykgrzesiak 32 Posted August 2 Share Posted August 2 I don't know if anyone still reads it - but I will share my experiences with dead Pro1 Yesterday it discharged and turned off - I connected it to a USB charger and got no reaction, black screen, no diode. I disassembled it and charged the battery to 3.85v on an external power supply, reconnected the battery and still the same, black screen, no reaction. The voltage on the VBAT pin is 3.85v, on the POWER ON pin is 1.8v both with USB charger connected and not connected. The voltage on 1.8v pin is 0 (0.7v with USB connected) When I press the power button the voltage on 1.8v pin is 1.8v for 1-2s, then falls back to 0 (or 0.7 with USB connected), with no other reaction. I am running out of ideas... 2 Quote Link to post Share on other sites
EskeRahn 5,604 Posted August 2 Share Posted August 2 Too bad. Any special circumstances? Could it be water/moisture that got in and messed something? It sounds like a hardware failure of some kind to me. (Let us try to ping @CornholioGSM that got experience fixing PRO1/PRO1X) 1 Quote Link to post Share on other sites
patrykgrzesiak 32 Posted August 3 Author Share Posted August 3 (edited) I just let it discharge to zero by accident, no other special circumstances - definitely not water damage. Edited August 3 by patrykgrzesiak Quote Link to post Share on other sites
Hook 3,359 Posted August 3 Share Posted August 3 That could create a problem if off mode charging wasn't enabled using fastboot commands, except you said you charged the battery and it still won't boot. Now I did have a problem with my old Pro1 in 2021 where the screen simply wouldn't com on at all. I tried replacing the screen, but that didn't work. Luckily it was still 3 weeks before it went out of warranty and I was able to send it to Fxtec and they fixed it. Never told me what they did beyond replacing the screen, but I had the impression they had to do something else. Not that any of this is of much help to you. Sorry. Quote Link to post Share on other sites
patrykgrzesiak 32 Posted August 3 Author Share Posted August 3 (edited) It is not just the screen - the phone is not detected when connected to computer When I connect 5v to the VBUS line it draws 0.5A for 1-2s, my impression is that it does not go through any initial first step when powered on Edited August 3 by patrykgrzesiak Quote Link to post Share on other sites
patrykgrzesiak 32 Posted August 5 Author Share Posted August 5 Update: Battery was the culprit. I have replaced the battery with Xiaomi Mi6 BM39 and my Pro1 has successfully booted to Lineage 🙂 Now I can at least transfer all my data... 2 Quote Link to post Share on other sites
TeZtdevice 373 Posted August 5 Share Posted August 5 58 minutes ago, patrykgrzesiak said: Update: Battery was the culprit. I have replaced the battery with Xiaomi Mi6 BM39 and my Pro1 has successfully booted to Lineage 🙂 Now I can at least transfer all my data... Does the battery Xiaomi Mi6 BM39 fit 1:1 ? 1 Quote Link to post Share on other sites
patrykgrzesiak 32 Posted August 5 Author Share Posted August 5 3 hours ago, TeZtdevice said: Does the battery Xiaomi Mi6 BM39 fit 1:1 ? No - the same plug, the same voltage, similar capacity, but no way to fit it into Pro1 case 3 Quote Link to post Share on other sites
EskeRahn 5,604 Posted August 6 Share Posted August 6 Great to hear you found the cause and a way to get the data out. We have in other threads looked for the battery, but AFAIK no perfect match have been found, sadly. 1 Quote Link to post Share on other sites
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