LG LST-5100P - quick repair
Today, I managed to quickly fix an LG LST-5100P STB 
.
Measuring the supply rail before the two 5V regulators had shown it was way down, just like in a Teac DV-B300, and was caused by C116 (LG) losing its capacitance without bulging (the same happened with C6 in the Teac).
Replacing all of the electrolytic capacitors except for the Daewoo/Partsnic RSM Series units (after the linear regulators - the 400V unit was also good, along with the Samyoung SRA/GSS series unit) fixed this STB.
C116 (before inductor connected to +5V regulators) and C118 (before inductor connected to +5V regulators) were Samyoung KME (general-purpose) units, of which they were not designed for high frequency use
.
.Measuring the supply rail before the two 5V regulators had shown it was way down, just like in a Teac DV-B300, and was caused by C116 (LG) losing its capacitance without bulging (the same happened with C6 in the Teac).
Replacing all of the electrolytic capacitors except for the Daewoo/Partsnic RSM Series units (after the linear regulators - the 400V unit was also good, along with the Samyoung SRA/GSS series unit) fixed this STB.
C116 (before inductor connected to +5V regulators) and C118 (before inductor connected to +5V regulators) were Samyoung KME (general-purpose) units, of which they were not designed for high frequency use
.