iMac 24 PSU LITEON PA-3241-02A1 250W
Hi everyone, got an aluminum 24 imac with a faulty PSU. First LED on the motherboard is on so trickle voltage is OK. When pressing the power button, 3 lights flash and then only one, 2 seconds pass then again 3 flash then back to one. I've tested motherboard with working PSU and all is well so not a motherboard issue. I can hear a clicking sound coming from the PSU each time it tries to power on. Also, when the power cable is connected, I notice one of the fans on the imac twitches. Very ocassionaly the imac will power up a bit but will eventually die again. All capacitors look absolutely fine, no bulges, leakage etc. I've had a look at the back of the PSU and I think I found the culprit. One of the mosfets looks blown. The board is darkish in that area and the solder on the front of the mosfet looks bad and its slightly lifted. I've provided photos, problem mosfet is on upper right. Thoughts? Also, does anyone now the part number for the mosfet I can't really make it out as it's heated so much, the numbers arent really legible? Would like to try soldering a new one. So if anyone know I would greatly appreciate it... Thanks
Hi everyone, got an aluminum 24 imac with a faulty PSU. First LED on the motherboard is on so trickle voltage is OK. When pressing the power button, 3 lights flash and then only one, 2 seconds pass then again 3 flash then back to one. I've tested motherboard with working PSU and all is well so not a motherboard issue. I can hear a clicking sound coming from the PSU each time it tries to power on. Also, when the power cable is connected, I notice one of the fans on the imac twitches. Very ocassionaly the imac will power up a bit but will eventually die again. All capacitors look absolutely fine, no bulges, leakage etc. I've had a look at the back of the PSU and I think I found the culprit. One of the mosfets looks blown. The board is darkish in that area and the solder on the front of the mosfet looks bad and its slightly lifted. I've provided photos, problem mosfet is on upper right. Thoughts? Also, does anyone now the part number for the mosfet I can't really make it out as it's heated so much, the numbers arent really legible? Would like to try soldering a new one. So if anyone know I would greatly appreciate it... Thanks
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