Sir the problem of your unit is the vertical section of your tv, first try to tap the side of your tv if the tv reacts there is a cold solder in the vertical section specially in the IC if you remove the cover of your unit, but be sure to unplug it first try to observe the solder part of the pcb look for this cold solder or loosed solder.
look for this sign. To fix this you should resolder it using soldering iron, soldering lead, desoldering pump.
And also bulging capacitor is the cause of this fault try to look for this capacitor, this bad capacitor is producing a low and unfiltered dc output that causes your unit to malfunction, replace this bad capacitor with the same type and observe polarity.
This is the bulging capacitor, hope this help good day and best regards.