820-3476-A (Orange Light , no fan spin, no power on, no chime)

techgeeksna

New member
Good Day guys, another board in for no power, no display no chime. Will not power off battery or charger, only orange light appears on led. (No battery plugged in)

Ive taken the following measurements for now.

PP3V42_G3H = 3.42V

PPBUS_G3H = 12.6

PP5V1_CHGR_VDD = 5.5V

PPDCIN_G3H - 16.7V

CHGR_ACIN = 3.93

u7100 pin 27/28 20.5 Ohms , on pin 17/18 :4.2 Ohms

pin 27/28 16.07v

U7100
1) 3.2MV
2) 16.5V
3) 3.9V
4) 2.58V
5) 1.42V
6) 3.4V
7) 1.08V
8) 2.11V
9) 0.03V
10) 3.42V
11) 3.42V
12) 3.42V
13) 3.11V
14) 3.11V
15) 0V
16) 11.7 v and 5.2 v (fluctuates)
17) 12.6v
18) 12.6v
19) 5.49v
20) 5.49v
21) 0.72v
22) 0V
23) 12.6V
24) 13.8V
25) 17.4V
26) 14.1V
27) 16.18V
28) 16.18V
 
Top