The most common symptom is the TV turning on (LED blue) and immediately switching back to standby (LED red), often blinking a specific number of times. This usually indicates:
He slotted a battered USB drive into the side port. The drive glowed a sickly amber. He began the ritual: Hold Vol+, Power On, Insert DC. Tp.mt5510s.pb803 Firmware
: Check the sticker on the back of the LCD panel itself. The most common symptom is the TV turning