After 18 months my picture kept going to black screen - sound stays but picture goes. Absolutely shocking TV - worst I've ever owned. I will be sticking to Samsung / LG in future

I bought a 42inch Panasonic LED TV recently (Biggest mistake in my life) and the VGA interface gone faulty within the warranty period. Panasonic had repaired the faulty VGA interface, but this had created another problem. I have been using 2TB HDD USB drive to record TV programs, now none of the programs are recognised by the TV. Spoken to Panasonic, the guy at the technical support was rude and arrogant, not willing to help. He says if the TV go for repair, you will have to reformat the HDD again to be recognised by the TV, that means you will lose the Data. He also said that if the TV get repaired, that means configuration on the TV has been changed, therefore HDD had to be reformatted to match the after repair config. There was no Hardware change on the TV. This means Panasonic TV operating system is completely useless. My friends have other branded TVs but they don't experience the same problem. I also have Samusang TV which is about 4 years old. Also went for repair for another issue, but it never had problem with the HDD access after repair. I also have Panasonic Camcorder, yet again, it is impossible to download the video clip from the camera to PC. You have to use their software which is very slow. In general, if you buy TV just to watch programs, then panasonic is ok. If you intend to record and watch later or record very important programs for future reference, then WALK AWAY from PANASONIC. Do Not Buy Panasonic. Its a useless TV and even worse customer service and technical support. I will not make another mistake by buying another Panasonic product. TV Model No: TX-L42D25B Camcorder Model: HDC-HS20