Question about Sharp Aquos LC-42D62U 42 in. LCD HDTV
No power. 4 blinks
OK I have just taken care of both of these problems and now I want to
share it with you DIYer's. As for the blinking red it is a software
download the software to your PC. Then unzip it to a USB flash drive.
Power off your TV. Stick the flash drive into your TV's USB slot, found
on the left side, facing the TV. Power it up and let it do it's trick.
Pull out the flash drive when instructed. That's it.
Now for the power problem. I noticed that my TV was taking longer and longer to fire up. Once on it worked great. Well this morning it didn't come on. I heard the usual relay click then a few seconds later...two more clicks and nothing. The green LED stays lite but it's dead in the water. So I started surfing the web for common problems found with this particular model. I came upon this forum and saw something about a couple of capacitors. So I decided to look into it. I purchased the service manual online for around $8.00 at https://www.completeservicemanuals.com/philips/magnavox/plasma-television/50mf231d/37-service-manual/prod_677.html. Not that I thought I would need it but it doesn't hurt to have it. So I took my TV off the wall and placed it on my bed face down. Be very careful because this TV is heavy!!! You will need to remove the stand or wall mounts first. Then there are 44 screws holding on the back, 32 long and 13 short. Pull the back off from the top of the TV first, set it off to the side. Now your looking at the workings...in the center is the power supply board. Oh yea please make sure you unplugged from the wall. There are 8 wire connectors to the board, 5 of them come off by squeezing the clip on the back, the other 3 just pull out. OK, there are 8 screws holding down the board to the chassis. Before lifting the board, locate the capacitors first. If the top of the TV is away from you and the bottom is near your knees (assuming it's on your bed) look at the center bottom of the power board. Locate two capacitors that are identical and side by side. Their values are 3300uf 10V. I found that these two buggers were raised on top, kind of bubbled. (if needed I have pictures of the power board, email email@example.com). I picked the replacements up at a local electronics store for less than $5. I simply replaced them and reassembled the TV. It works killer just like when it was new.
Posted on Sep 03, 2009
I had the exact same problem with my Magnavox 50mf231d/37. I had come to the conclusion that I would replace the power supply first. As I looked closer at the power supply, I noticed that there were 2 capacitors that looked like they were going to pop open. I took a shot and replaced both 3300uf/10v capacitors (purchased locally from an electronics shop) for about $5. Re-installed the power supply and it works great again. I don't recommend soldering components yourself, unless your qualified. I did a lot of looking around the web for answers to this problem, and they were hard to find, so I vowed if I was able to fix it myself I would take a minute to post whatever worked for me, so here you go. Hope it helps.
Posted on Nov 24, 2008
I have the same problem but i play with it by pluging it in multiple times and i hear it click on then off eventually the time between it clicks on then off is longer until i finally get it to stay on .I have to do that everytime i use it . Also the update wont work for me either tried everything. It must be with the power supply becuse once i get it on it stays on, and if i turn it off after its been working for a while it comes right back on perfectly. Only when i leave it off for a few minutes the symptoms start right over.This is what i do for about 5 minutes of plugging it in and out it flicks on and then off about 2 seconds later after that ii finally get it to flck on then off about 6 seconds later. 5 more minutes of pluging it in and out it takes about 10 seconds to flick off this is when i know it is about to work.finnally the green light will stay on and the tv wont flick off you can turn it on and of with the button wait 2 min to see if the picturecomes on repeat last step until it works.This means everything works great exept for the power supply for enitial startup. I beleive its a capacitor . I will check and report back.
Posted on Nov 24, 2008
All it is is a reset button that you have to press INSIDE the TV that involves taking it apart
Posted on Jul 04, 2009
I found my capacitors bubbled also, had a electronics buddy replace them with 3300 26volt and the set works now.initially I had to restart about 3 times but now it works perfectly, but I cannot get the new software to download to the set. my version is 12/26/06
Posted on May 14, 2009
Hi this is dee from deesfunhouse I had the exact same problems with my magnavox 50mf231d/37 as you were having, so i took your advice. I had the capacitors replaced but when I put the board back in I now get these symptoms...1 I get one click instead of two now and In the front nothing on the screen but the green led light comes on there are no red light that come on. when I turn it off the green light just goes out there is no red light , no picture, and no click. In the back on the power supply board only one of the two green lights light up. what could have cause this? ...I used to get the same symptoms you did before I replaced the 2 capacitors but now I'm getting nothing...please help meI was going to replace the power supply board (LJ44-00108C PS-504-PH Part REV: 0.7) do you think this is a good idea? or did I hook something up wrong please help me with this!!!!!!!
Posted on Nov 18, 2009
Look on the Power supply about in the center towards the bottom of the board. There you will see two medium size capacitors rated at 3300uf, 10 VDC. The top of the capacitors will be bulged up more than the others on that board. I replaced them with two 3300uf, 16VDC high temperature capacitors. TV works fine now.
Posted on Sep 25, 2009
OK, I fixed a Magnavox 50mf231/37 today 12/15/12
Here is what I have to offer.
Unit face down rear cover removed.
Standing at the bottom of the tv
Plugged it in, clicks, lights and then clicks out with a green light flashing on a secondary board located on the upper left of the power supply board which is in the middle of the tv. Did some research and found this link and looked around, Found the 2 caps bulging out the tops which are almost dead center towards the bottom of the power supply board right next to each other just to the left of a heat sync. Ordered them, replaced them and I have a fully functioning tv. No uploads needed or anything. Noticed people wondering about the polarity. Not only are the caps marked ( long silver line is the negative side ), but the leads, one long + and one short - ... Now the circuit board is also marked + and the negative is a series of lines. They have to be installed correctly or they will fail and could get ugly. Radio Shack DOES NOT carry them. I found several places online to order them but an Ebay seller had sets of 2 for $6.50, free shipping. Some of you in bigger cities may be able to source them locally for cheaper as I did find them online for .69 cents a piece but shipping extra.
I do have pictures for anyone trying this repair. Makes sure you have a good soldering iron and patience !!!
Pictures shows the cap and the board with one cap removed, the other blown cap bulging out the top still installed next to the heat sync. Hope this helps. I haven't had to do anything yet. Although I am going to go download the update and install it soon...
Posted on Dec 15, 2012
Go to the magnavox web site and download the software upgrade onto a flash drive. PLug it into your television and power up...your problem is described exactly as the reason for the upgrade.
Posted on Jul 08, 2008
Is this for a sharp or magnavox?
Posted on Mar 14, 2008
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Posted on Jan 02, 2017
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