Hello hivemind! This one has me stumped. PS5 EDM-020 board. Started as a 2 second BLOD, however the boot sequence was very strange, as with 12v going in, the amp draw would raise to about normal (.32 amps) and crash, then automatically restart, as if boot looping. No shorts on the board at all, all voltage rails present, except the 3.3v would crash in some areas.
During the bootloop, the Dialog IC that powers the SSD controller was getting crazy hot. If i removed any inductor around that IC, the bootloop stopped and the amp draw at startup would sit at about .16 - .22 amps then crash.
I replaced the dialog IC and the bootloop has stopped, but the startup is still sitting around .16 - .25 amp draw. It has also turned into a “beep once every 30 seconds but no light” error. I have checked the voltage rails at the inductors around the IC and all are present, the two 1.2v, the .8v and the 2.5v are all present at startup.
UART gave me 4 codes for the SSD power failure, so i replaced the SSD Controller chip. Same issue, same codes. I have tested the test points coming from the SSD controller in diode mode and all teat point have .53 voltage drop, no shorts on any test point at all. There are still no shorts anywhere on the board, i have checked everywhere.
I will gladly send links to the live repair i did on this console if someone would be kind enough to review my work, i cant include them in the post. If anyone has any suggestions, I would be so grateful. Thanks in advance!
Update: after double checking the connections on the Dialog IC and touching them up, i am right back to the 2 second BLOD and boot loop. This thing is a nightmare lol
Hello RoysRepair! Did you recheck the board with a thermal camera after replacing and touching up the IC? No hotspots? Also, what is the resistance of different rails? It happened to me before (with laptops) that rail wasn’t shorted, but the resistance was still far too low.
Thanks for the response. There are no abnormal hot spots, no. Since the touch up and the reappearance of the apparent bootloop, the southbridge, ssd controller, and the IC powering the ssd controller, all get warm as well as the apu. New UART readings are giving me codes
80800024 - Check APU for Die Crack
C0020303- APU Not Responding
I believe I am big time boned. Pretty sure the APU is done for, though i did not see a crack in it.
I am sorry about that!
Correct me if I am wrong, but isn’t it too early in the boot process to wait for an APU response? Judging by the power draw the APU is not even being supplied with power yet.
Did you try reflashing the bios?
My apologies for the confusion. Since the touch ups on the dialog chip, the power draw appears almost normal, jumping up to .32 amps and back down to around .07, but then it cycles that voltage pattern over and over again consitently, as if stuck in a boot loop. So the APU does get powered on, it just cant fully power on. I have not attempted a bios reflash yet, that may be the next move. Cant hurt anything at this point.
Got it, sorry for not reading it properly. So the vcore voltage is present? Did you check if APU heats up (even a little bit) under a thermal camera? Is there a spot that heats up rapidly or is it uniform?
I am not very familiar with PS5, so those are just couple of my wild shots based on troubleshooting other systems. 
No worries, i appreciate the help. Yes the APU is warming on every boot attempt in the loop and apparently at an even rate, though the RAM BGA chips dont seem to, which is unusual. It’s the voltage loop that is throwing me off, ive fixed a lot of these consoles and never once run into a voltage loop like this.