LG SJ2 - Wireless Interference & Noise

3-2
ONE POINT REPAIR GUIDE
1. NO POWER PROBLEM
No power problem occurs when you power on the unit.
1-1. Solution
Replace XL301, IC307, IC305.
1-2. How to troubleshoot (Countermeasure)
1) Check XL301(Crystal).
 If it does not oscillate, replace XL301.
2) Check IC307(Reset IC).
 If its output voltage is not more than +3 V, replace IC307.
3) Check IC305(DSP IC).
 After Power is ON, if the pin153, 154, 155, 156 of IC305 is no signal, replace IC305.
But, the new flash IC need to write program.
1-3. Service hint (Any picture/ Remark)
< MAIN board top view >
IC307
IC307
XL301
XL301
IC305
IC305