820-2850-A no power, green light yes, power rails good

[bruce1129]

green light= yes
pp3v42 good/normal

ppbus_g3h good/normal

pp3v3_s5 good/normal

pp5v5 good

ppv3v3_s3 NOTHING HERE (ENABLE IS 3.3V On mosfet, but its a P mosfet, idk if that means the voltage should be lower than the output,)
(ARE S3 LINES SUPPOSED TO SHOW BEFORE THE DEVICE POWERS UP?)
no ppvp_fw (idk when this is supposed to show)
original problem, no power, 3 burnt components on audio jack line (replaced them) ran a jumper on that line as well.

help please

 

[dukefawks]

good/normal is not a measurement. Are you using a REAL 85W charger? This will not power on from 60W and Chinese garbage.

 

[bruce1129]

my bads im new to posting, ill add measurements, the charger is original, and i have several to choose from which all appear original.

 

[dukefawks]

SMC_ADAPTER_EN high?

 

[bruce1129]

I measured smc_adapter_en on R5085, and i get 3.4v

 

[dukefawks]

Check 5V_S3 bus if there are pulses. Multimeter are too slow to catch so best to use a scope. Check all rails for short to GND.
Does the battery charge?

 

[bruce1129]

i dont currently own a scope, if you have a recommendation for a cheap but good one please let me know. Idk if the battery charges or not so I will check that as well. Thank you for your help, I realize when someone is new its a bit frustrating to help them, so again thank you.

 

[G.Beard]

i dont currently own a scope, if you have a recommendation for a cheap but good one please let me know. Idk if the battery charges or not so I will check that as well. Thank you for your help, I realize when someone is new its a bit frustrating to help them, so again thank you.

150MHz Tektronix CRT scope for £170!!!!

http://www.ebay.co.uk/itm/Tektronix-...-/232295390510

 

[dukefawks]

No need for 150MHz. A 20MHz scope will do too, you can pick them up for free everywhere.