I have a TCM model Nr. 27L66 (also with 232951 on label). It seems to be a BEKO, probably specially labeled for TCM, who don't respond to "what chassis" question.
The PSU is marked 24V system. ZZ7. 194P-5. BEKO LCD PSU-3
Main board has BEKO Electronik - LW7. 190R-2. It carries two "tuners" (one for PIP?). There is a paper label with LE27W CH5 -----. P4U. 194-3
A further board (PIP?) has BEKO ELECTRONIK. LM6.194-3
Inverter board has 7 sections.
Display. 24V. Label:-- MS44 D002833- LSP5Y02A10433.
When I first got it, it showed OSD indicating channel number, then the 5 minutes time out.
I made a start looking at voltages on the tuner, supply certainly present, but then I realized it was completely dead. Switch on, nothing. Not sure where to start, but a circuit would be a real help.
OldLes