820-00840 20v jumps between 0.011 to 0.020A

[iremont]

After ssd replace board 20v no power and not turning on. where to start ?

 

[2informaticos]

Same behavior without SSD?
Do you get 3V3_S5/SUS?

 

[iremont]

3v3s5 jumping 0-3.3v like restarting it

 

[2informaticos]

Check for knocked off components.
No other reason, if machine worked good before...

 

[iremont]

everything seems good, no knocked off components

 

[2informaticos]

Check diode mode to ground on SSD power lines; w/ and w/o SSD connected.
Compare with good board.

 

[iremont]

everything seems same with diode mode. when i pulled u7800 up, board stays 20v 0.020a

 

[2informaticos]

Board cannot start without PMIC.
There should be induced damage, by wrong manipulation.
Was the battery disconnected?

 

[iremont]

battery disconnected.