Originally Posted by maintainin
Well the drive passed seagates seatools long test.
Did you take those voltage reading with the TV in a good connection and a failed connection state? IOW do not disconnect any wires or change any conditions (including the state of the TV) to make measurement during the failing setup.
One final test of that drive. Use a hairdryer on high to heat the disk drive's computer (PC) board. If a drive is OK, then it will pass all Seagate read tests even at that higher (and normal) temperature.
Heat is fabulous tool for locating intermittent defects. If the drive fails at that higher temperature, then the drive is defective. If not, only remaining suspects are the mainboard and connections to it.
Don't recall details on each connection. Is it coax cable? What specifically connects to what?
You might also perform the heat test on the mainboard. If heat cause failure to occur more frequently, then you know exactly where the intermittent defect is. Not a most likely suspect. But an easy test.