820_2915 missing pm_slp_s4_L

[Chuck60]

Hi I checked al the cpu prerequisites

ppvrtc_reset_L=3.3v
Pch_srtcrst_L=3.32v
Pch_intvrmen_L=3.24v
Pch_dswvrmen_L=3.24v
Sysclk_clk32k_rtcx1=.489mv
PP3v3_s5=3.3v
Pp3v3_sus=2.7v
Pm_batlow_L=3.3v
Pm_rsmrst_L=.468mv
Pm_pwrbtn_L=3.45v

u2800
Pin 1 ppvrtc_g3h= 3.3v
Pin 2 pp3v3_s5=3.3v
Pin 3 sysclk_clk25m_x2_R=1.2v
Pin 4 sysclk_clk25m_x1 = .9v
Pin 13 pp3v42_g3h=3.42v
Pin 12 sysclk_clk32k_rtc= .390mv

I replaced r7822 and c7821 that where torn off and u2890 had burnt traces pins 3,4 ran a trace to pin2 “plt_reset_L” from r2889 pin 1 from pin 2 of u2890.
thank you for your help

 

[2informaticos]

"Pp3v3_sus=2.7v"
Are you sure?
Check why...

 

[Chuck60]

I’m sorry my apologies pp3v3_sus=3.3v
I’m thinking it’s the u2800 or y2805 but I’d like your input first
U2800
PIn 14 pp3v3_t29= 2.49v
Pin 11 pp1v8_so =1.8V
Pin 6 pp3v3_enet=3.3v
Pp3v3 seems a little on the low side and I checked them multiple times.

 

[2informaticos]

3V3_T29 is to low; check U3890.
Removing U3880 should disable T29 block.

Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.

 

[Chuck60]

Ok I will trigger smc_on_off and check pm_pwrbtn_L. I had I to a S0 state with 1/4 spin and now it’s back in short :/ It has no gpu so that’s not a problem.

 

[Chuck60]

Ok so when I checked smc_on_off_L pm_pwrbtn_L does pulse. Since someone removed j6700 I figured I’d check u6201 and it was shorting the 5v rail I changed it and now I’m booting fine. Fans spin It chimes But has no audio In OS X. the same issues as before but in reverse as Homer Simpson would say “d’oh“ I replaced j6700 and I found 3 Through hole traces were Burned. ( J6700 : pin 9, GND ‘I tied in to ground‘, pin 8 pp3v3_so ‘Also repaired’, pin 7 aud_spdif_out ‘which I tried grounding and it did nothing’ So I left it without connecting it to anything’)Head phones do work but built in speakers don’t. How can I disable spdif Out. I have no red light inside port. I need like a jumper solution I’ve removed a few resistors and what I believe are filter capacitors still have gotten it right yet. R6805 ? I don’t have the whole machine Todo a software disable
I’m sorry I took this weekend to work on the bottom of the barrel
Thank you for your help

 

[2informaticos]

Removing R6805 should disable SPDIF.

macOS recognizes speakers?
What says when you connect/disconnet headphones?

 

[Chuck60]

Mac OS doesn’t recognize internal speakers. When I connect headphones it says headphoneS in setting/sound (input/output area) let me ask you the link between aud_spdif_out and the component by u6201 is broken will this in anyway affect it from not switching to internal speakers ?

 

[2informaticos]

Check connections for pins 1 & 2 of J6700.

 

[Chuck60]

It’s all good thanks for you help I’m on to the next board now

 

[2informaticos]

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