JDM-040 restoration

[francodetablada]

Hi everybody, first for all, sorry for my bad English, I'm Spanish speaker, I have a problem with a jdm 040 motherboard, I buy this ds4 for repair, some dude wants to change the analog stick, but her soldering was poor and screw some tracks, and there's a missing component, I think I repair the tracks and replace the part but the ds4 only turns on when y plugged to USB, dont turn on with the ps button, and only works a few second and freeze, when this happen the only think what can I do is disconnect the battery. That's the component I replaced, thanks for your time!

[francodetablada]

The pic doesn't upload, there's again
https://imguh.com/image/OmBt2

[RDC]

It is also missing a 100k Resistor to the left of where you replaced the Capacitor. That would only affect R3 though.

That board has what looks like corrosion damage around the BlueTooth IC there also, and if is is, then under the large MCU is probably a real mess.

[francodetablada]

Hi mate, thanks for your reply! I dont see the corrosion what are you telling me, maybe it's just rest of dry alcohol or something plus the reflex of the camera flash, I'll upload 4 more pics, I think the resistor its here, but the pic and rest of flux dont let you see it, I found a component and it's like burned, can you tell me the correct value for this? Thanks!!
https://imguh.com/image/OzcyO
https://imguh.com/image/Ozbai
https://imguh.com/image/OSNMv
https://imguh.com/image/OSwrt

[RDC]

Yeah that Resistor is there. That capacitor and trace are corroded, not burned. That area isn't populated on my board here, so no way to measure it. Most likely it's a decoupling cap and would be fine with it removed.

[francodetablada]

Ok, do you´ve the reading of voltages in the main IC? May the PS button isnt working... Have you any idea why the MB freezes? i do a short gif to show you
https://media.giphy.com/media/RLJXV6bFqJUGrSX1kp/giphy.gif

[RDC]

The main IC is a BGA, I couldn't probe a fraction of those connections if I wanted to. No real idea why it freezes, never seen one act that way. The thing looks like it's seen better days though, and I still say it has corrosion damage that is most likely under the MCU as well and would cause all kinds of issues.

[francodetablada]

Sorry, can you show me in my pics where's the corrosion? I dont know what is a mcu,  sorry

[RDC]

MCU is Micro Controller Unit, the main IC.

I have already pointed out that the Cap you thought was burnt is corrosion. There is something all over that board around the IC leads and several other components on the top of the board, and if it's there, then it's under the MCU as well.  The PMIC, Power Management IC, on the back of the board (bigger IC on back) has corrosion around it for sure as you can see the darker green trace just like what is around the Cap on the top side.