820-00165 no power, orange light.

iClub

Member
I identified oxidation in the u1900, replaced, but there was no result.
PPBUS_g3h 8.59V; pp3v42_g3h 3.42V; PM_SLP_S4_L 3.36V; ALL_SYS_PWRGD 0V; pp3v3_SUS / S5 3.34V; PP5V_S0 5.13.

Coils:
L7130 8.60 / 8.65V
L7520 5.14V
L7560 3.34V
L7430 1.2VV
L7630 1.05V
L7310 0V
L7320 0V
 

2informaticos

Administrator
Staff member
Now remove x_PGOOD resistors from page 59 (one by one), untill ALL_SYS_PWRGD goes high; keep in place R8167.
 

iClub

Member
I removed the R8166, ALL_SYS_PWRGD was high, I identified that there was oxidation under the u7820, subsititute solved the problem. Thanks buddy!
 

iClub

Member
Back to this post, ALL_SYS_PWRGD is 0.94V when you put R8166 back on the board, replace u7820/c7820 with oxidation, worked for a while, but stopped again. When I remove R8166,ALL_SYS_PWRGD becomes high again.
 

iClub

Member
I'm sorry I left the r6130 missing, I put it on, it worked. But now when you turn it on, after a while the screen starts flashing, it drizzles. I think the memories must have cold welding, what can it be?
 

iClub

Member
I tested another display, but when the CPU starts cracking and flashing the display, I don't know what to do, do you have any suggestions?
 

iClub

Member
I tested it with another display and on the outside, but the defect continues. So I would have to perform CPU or RAM reball ?
 
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