820-3536-a wont turn on

[dukefawks]

R6131 is no stuff on these boards.

 

[Gannons3]

okay i replaced U1900 with a brand new chip and now L7520 seems to be pulsing: still no fan spin

 

[Gannons3]

pp5v_s0 is pulsing

 

[dukefawks]

Anything can cause pulsing power. Is CPU Vcore pulsing too. The usual suspects apply, U6100 are, termination resistors, U1950.

 

[Gannons3]

yes PPVCC_S0_CPU is pulsing

 

[dukefawks]

U6100 area issue is most likely then. Could also be pretty much anything else. Check all termination resistors in U6100 data lines and all traces between them.

 

[Gannons3]

r6130 isnt no stuff is it?

 

[dukefawks]

That is correct.

 

[Gannons3]

okay that resistor is missing on my board not sure if i knocked it off messing with u6100 or what ill replace and see what happens

 

[dukefawks]

I meant it IS no stuff.

 

[Gannons3]

i was getting an infinite resistance from pin 1 to 2, so if i put a 33 ohm resistor there would that work?

 

[dukefawks]

Again, R6130 is not supposed to be on the board.

 

[Gannons3]

so its not apart of that system at all?

 

[dukefawks]

I don't know what you want me to say man......NO STUFF.

 

[Gannons3]

I dont have a programmer, would it be worth it for me to get a new U6100 chip or is that not going to be it, I havent found any problems with any of the resistors and they all seem to be connected

 

[dukefawks]

To fix the board you will need a programmer, assuming it is U6100. Get an identical donor board and take U6100, but only for testing as the ME region needs to be fixed if swapping the chip worked.

 

[Gannons3]

so buying a pre programmed U6100 wont work? also how much can i expect to pay for a programmer

 

[dukefawks]

Buy a TL866. Pre programmed usually is a dump from another board and ME region will be fucked. Get a donor board, you need those anyway.

 

[Gannons3]

sorry for being an idiot but whats the "me" region

 

[dukefawks]

Please google "ME region" way too complicated to explain here, but it is important to save the original one to merge with a new BIOS.