LG GD580 - Page 122

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4. Trouble Shooting
3.7V
OK?
Step 1
Check Point (TP1) in
Power Source Block
g
To Check Power
source to Check if
main power source
input or not
Yes
No
Proceed to the Step 2
3.7V
OK?
No
Yes
Check the Power Supply
Short?
No
Yes
Soldering Check Component
(CN300)
In Power Source Block
g
Check Point (TP2)
in Power Source Block
g
To Check Power source
Change Board
Check (TP1 & TP2)
in Block
c g
to check inner line
connection
From TP4 to TP3