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yes has chime and usb

Hi , ive got and 820-2879 no image, laptop had water damage, as far as i can tell u9000 is not being told to turn the screen on, on pin 1 LCD_IG_PWR_EN i get 0v, diode reading is .496 so it dosnt seam to be shorting , pin 2 and 3 i get 3.3v , gpu vcore is at .085v so im guessing thats on, any...

yes meter is autorange i get 0.646 kohms , range only has Ohms ,Kohms and Mohms, what do you mean by MCP's ?

Hi voltage at l7770 is 1.05v, dont have 200k scale on meter but in diode mode it reads 0.323 which is the same as a working board

Hi, ive got an 820-2530 not turning on,no signs of water damge, have a green charging light, ppbus g3h is 12.51v , missing pp3v3_s3, at Q7910 i get 3.3v on pin 4 and 3.1v at pin 3 yet nothing going to pins 1,2,5,6 , there is no short on any of the pins of q7910, i have tried jumping from pin 4...

Thanks duke , saves me asking a stupid question again :-)

Thanks john

A1534 maybe a really dumb question, where is the board part number? Ive got an A1534 in for water spill so its not turning on at all but ive looked all over the board and cant see a part number, its a early 2016 and there seams to be 3 different variations according to the serial number for this...

CPU_VCORE isnt coming on , PPBUS is steady at 12.48V

ok , i lost green light all together and developed a short on pp3v42 so i injected 3.4v into the line and the smc started to get hot, changed the smc and now i have green light back that now turns to orange after a few seconds and the fans spin up for a second then turn off and spin up again ...

in ohms mode with red probe to ground i get 28k on p3v3sus_en

on P3v3SUS_EN i get OL in diode mode is that right ????

think im learning :-) , yes traced back to u8020 PP3v3_S5 is there but P3V3SUS_EN isnt there , which when i try to find where it comes from i end up at the cpu :-(

Hi, 0.482 in diode mode so it dosnt seem to be shorted

changed u1900 / 1950 just incase PPVRTC IS 3.3V , BUT PP3v3_SUS is missing from the board , when i look to see where it is created from it looks like it comes from the cpu is that correct ?

Just a quick follow up , replaced smc and all is fine

820-3435 not turning on missing PP5V_S4RS3 which if im right turns on u8080 to make pp5v_so, question is i cant find where PP5V_S4RS3 comes from,originally the board was liquid damaged, replaced u7090 c7090 c7091 r7005 r7006 due to short and missing pp3v42g3h and no green light (now working) ...

looks like isl6259 went bad , now have green light , but now have 12.26V at ppbus f7040 / f7041, dc in fuse is still 20v, is 12.56v at ppbus now pointing to smc ??

Hi , yes ACOK is 3.2v at pin 14 u7000, dc in fuse f6905 is 20v and ppbus at f7040 / f7041 which was 11.9v has now dropped to 5.3v ?

Hi yes ACOK is 3.2V at pin 14 u7000, dc in fuse is 20v , ppbus_g3h at fuse f7040 / f7041 has now changed to 5.3v which was 11.96v