![background image](http://html.mh-extra.com/html/samsung/sgh-x820/sgh-x820_service-manual_1190229043.webp)
Flow Chart of Troubleshooting
10-4
10-1-2. Initial
Initial Failure
Yes
①
Check VCCD,
VCCD_1.8V of U300
"High" when the phone
is boot on`
No
Check
U300
Yes
②
Check
the HP_CORE_1.6V of
U305 is "High"
No
Check
U305
③
Yes
No
Check
CN305
and LCD part
LCD display is O.K?
Yes
Check audio part
Sound is O.K?
No
Yes
END