i have a strange case:
i have a 56MX195. i bought it from a friend who was moving and wanted to get a new tv. it worked fine for 3 months or so but then one day i started having problems. the problem i've been having is whenever i play anything with a display of less than 1080i, i get sound but no picture. most notable is on my PS3. games and movies that play in 1080i work fine. the 720p ones flash just as the game starts then just give me a black screen with the normal sound. if i exit out of the game (blindly) the picture returns when it gets back to the 1080i PS3 menu screen.
i have my cable (COMCAST) going through the other HDMI port and so far no problems there either (1080i output). i did try switching the HDMI cables and switching the imports (putting the PS3 in port 1 as opposed to 2) and my Nintendo Wii is in Colorstream 2 and i only get sound there too as the Wii doesn't support 1080i. and once again i get the same black screen from the AV1, 2, and 3 ports too.
so i tried the factory reset and still have the same problem but now when i turn it on it takes 4-5 minutes to light up (but i get sound right away). the quick start setting is set to on but if i cut it off and turn it back on right away, it takes another 4-5 minutes. i think that might have something to do with the bulb life but it's been doing the same thing for about a month now. after reading through some of the post here for the past few days, i tried checking the bulb hours but i get "no display" there. i'm wondering if there is another secret setting that might affect the resolution problem?
so tried calling toshiba but they said they couldn't help me with that problem and directed me to a local repair shop in my area. i'd rather not spend the money for a repairman to tell me the same thing. i haven't seen this problem anywhere else on the internet in my searching for the past month so i'm asking here. any answers?
i've tried unplugging the power cord for a while to hours, changing the power strip, changing to better HDMI cables, checking on another tv (everything worked fine on it), factory reset, changing the display setting on the PS3 (it's not that), and changing the tv's limited display options.