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Hello there. I´m running a 741 I bought used off ebay, and ran it for a few months, since mid December 2021. Fan got busted, was replaced with another one one month later, not exactly the original and started to reboot when weather was too hot. I wasn´t aware of the log (newbie), but while I was working in the research, the right (second) PMU board lighted red LED and stopped working. I disassembled the whole thing, and took both the hashing board and the PMU to a technician. He identified a 6 pins integrated circuit in the PMU as the possible failure. Anyone could please led me to a place to buy this part? I´m in Venezuela, but have a US post address and can receive shipping no problem. This machines are one of my income means, hence my nick "survivor". I would greatly appreciate any help. There are some local companies that will fix parts like boards but I do prefer (our weather in the range of 23°C-32/34°Cis a little bit hot to do some overclocking unless you use liquid cooling) to get a new part to keep the device running as long as possible.
Look forward to hear from you!

Why not replace the whole PMU?
I tried to search through Google it seems no one selling ICs for this PMU. Can you check the IC model # it should have characters under that IC?

If you see them try to check this shop below

- https://www.zeusbtc.com/Integrated-Circuit/

Or try to contact zeusBTC for help here https://www.zeusbtc.com/ASIC-Miner-Repair/

Thanks you VERY much. That is indeed my idea, to get it new if possible. My friend is getting a magnifying glass large enough to check the IC part model number, as his USB microscope got busted. I will check ZeusBTC right away!
Gracias amigo!