Sony MBX-247 Case Study

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Make/Model- Sony
Motherboard Part No- MBX- 247 Quanta HK1
Processor Type-I3
Ram Type -DDRIII
Problem –No Display
Diagnosis-Corrosion
Process-
Laptops comes with not display condition …
Symptoms PSU takes a load on 0.33 Amps and power trips off
Checked for 3.3 /5v regulator Found no issue with voltages
On physical verification found Corrosion in the Vcore section ..
Cleaned the pads and Replaced PR113( 2.2 ohms) which is 19v
Supply to Vcore IC….
Job done
Here are the pics