1502 820-4924 Pulsing at L7560

[Tony Tone]

Ha, ha. Sorry Duke. I have no idea either. I tried a couple of times. I even read for further directions online. I'll try it again and report back. I know its simple, but have no clue what I'm doing wrong : )

 

[Tony Tone]

I first tried by shorting C4810, and then assembled and tried that way too. First time I've heard about SMC Bypass. Found some things online about it. Never knew about it.

 

[Tony Tone]

With the battery plugged I get 12.86 on F7140-2 after SMC Bypass. Without the battery I get 12.56 and no pulsing at R8141-2. This is a new battery, and same thing with the old battery.
I am doing the SMC Bypass by shorting C4810 with tweezers on each side. I am holding for 10 secs, then I plug in the power cord and wait 5 secs, then I release C4810 and wait 2 secs, then I pinch C4810 for 1 sec and release. Am I doing this wrong?

 

[Tony Tone]

& this time I experimented by no battery holding C4810 plug in battery then power, wait 10 secs, release, wait 5 secs, then hit C4810 for 1 sec and getting 12.25 at F7140-2.

 

[Tony Tone]

I do get 5v on the pp5v_s5, I get .218v on pp3v3_s5, and nothing on the s4's. So I am guessing that I need to check my pp3v3_s5 rails?

 

[dukefawks]

Out of ideas on this one besides to check for corrosion or missing components damage.

 

[Tony Tone]

There was no water damage at all. The paranoid customer just picked it up, so no worries. I am taking mental notes and learning something new though : )

 

[Tony Tone]

I am curious though on what your thoughts are.

 

[Tony Tone]

No missing components never opened before. I seen nothing burned out.

 

[dukefawks]

i have no clue, but I very much doubt it "just" happened. May have been dropped or hit.

 

[Tony Tone]

Yes, I thought it was very strange because I never seen anything like this in any of Louis's videos.
Once again I thank you for your assistance Duke : )