Question Non-working PS2 79001 diagnosis

[Laminatesnow]

Hello All!

A while back, I bought a PS2 Slim 79001 on eBay as a parts console. When I connected it to my Sony-branded 8.5v power supply, it wouldn't turn on (no red light, no response at all). After learning about the PS2 Ultra Slim mod, I decided to go through with the required mods, only to find that wiring reset in the required manner did not power the board on.

I did some prodding w/a multimeter, found that the only voltages available were 8.5V, 1.8v stby, 3.5 stby, and 1.25v, and traced the issue to the 6-pin MOSFET near the PS1 fuse marking. I also checked all fuse continuity and found none that were bad. I replaced the MOSFET with an FDC658P from Digikey (which didn't solve my issues), but found that connecting 8.5v to the voltage regulator near the top video caps caused the optical audio light to turn on, warm up the CPU, and show all voltages when I checked again, but it still didn't turn on. I tried again with the 6-pin MOSFET off and the same results presented themselves.

Now here's the final question: has anyone ever encountered this before? How can I get this working, as I'd hate to send this to the bin all over something fixable...

 

[Buratsupoy]

I have the same model and in the same situation, board model number GH-062-22, also did the same test with all mosfets but still stuck on no power. I'll post an update if I find anything

 

[Buratsupoy]

Luigid mentioned on his thread that:
by changing the integrated cxr726080, the motherboard can startup

Thread 'ps2 79001 issue'

Sep 24, 2017

hi guys, a couple of problems with two 79001 cards, one board the voltage on the reset pin (3.3v) is missing, the fuses are ok,so I can not turn it on.what can this cause? , another card (always 79001) lights up but shows black screen, fuses always ok, thanks in advance

• Luigid
• Replies: 3
• Forum: Sony

 

[Laminatesnow]

I found this video after looking up that part number, it looks to be related to the Mechacon, from what I'm seeing. I don't have a BGA workstation, so I might have to call it quits if this trick doesn't work.

 

[Luigid]

if you are lucky and can get it off well enough with flux while keeping the balls on both the board and the cxr there is no need for reballing.
If you don't have voltage on the reset button, unfortunately it's the cause, but from what you've said, I find it difficult to believe that it's the problem. Usually the mecha goes out while someone is doing tests and inadvertently sends voltage to the reset cable.