I have a magnavox 32MF123D/37 lcd hdtv. Over the past few days, I have noticed a hissing sound from the tv speakers( the volume is not turned on for them) and picture turns off sporadically, but the power but is still on. There has been no movement/jarring to the tv and it is recieves proper vetilation.
SOURCE: My magnavox 37mf321d 37 LCD tv
This is a bad power supply and an easy fix. Their are several electrolytic capacitors on the power supply. If one is bad it will have a bulge on the top. Mine had a bad 2200uF and a bad 1200uF capacitor. About $7 worth of parts at Radio Shack. Radio Shack had the 2200uF but it was axial leads instead of radial. (leads come out of each end instead of one end) but It will still fit. They only had a 1000uf capacitor so I combined that with a 220uF capacitor and wired them in parallel. Make sure you put them in with the correct polarity.
SOURCE: Have a Magnavox 37 inch lcd hd tv When I turn the
sounds like the audio / digital board is going bad ---- they are about 130 refurbished and 300 new ----- look for one online before you pay an overpriced service tech who really doesnt know how to fix these tv's ----
I called the service support and they gave me three companies in Nevada --- each one of them had no idea what the codes meant, but would look at the TV for 225.00 - sounds like they need new companies to do their repairs on warranty
SOURCE: problem
power board is bad if it doesnt power up -- the red flashing lights mean that you need to upgrade the software-- you can get a new software upgrade on the website for philips --- use a thumb drive to install it into the television
SOURCE: Power but no picture or sound
Your mainboard is damaged, replace it and that will solve your issue.
SOURCE: Power but no picture or sound
Hi, could be the main board but first you need to look for swollen capacitors on the power supply, here is the process:
, the solution to fixing your TV is most likely the power supply, if you are wanting to repair it yourself and can solder, it is most likely going to need (2) 1200 or 2200mf at 35volts electrolitic Capacitors, or you can replace the whole power supply. The back is held on with a few screws around the back and edge and then you need to pop the edges loose starting at the bottom side corners. once the back is removed the power supply is mounted inside a rectangle metal shield , remove the screws around it and the little ones going into the jack/input section (using a short philips there), there is a wire running from a circuit board to the USB input be careful not to pull on it, unplug its wire from the CBA. then look at the power supply (top center board) the cylinder looking capacitors that are bad will be bulged on top, usually there are two 2200mfd at 10 or 25volts. changing them should get it working. A repair shop will charge you around $250 for this job, FYI
hope this helps
thanks
Eric
I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771
I am using this great LCD for about an year. But few times in the past my LCD didnt show up the display though the Green light was still ON, turning off the LCD and opening it again always solved the problem. But now My LCD completely went blank. Turning off/on didnt work at all now. I've tried couple of other tweaks mentioned on this site but they didnt work. I am just seeing a blank screen with green light ON. and ya theres a very low hissing sound coming from the LCD.
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