Question about Philips Magnavox 50ML8105D 50" HDTV DLP TV

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My 50 inch magnavox takes ten to twelve trys to get it to stay on it repeatedly shuts off on its own and the red lights come on

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It's the problem of overheating in the power supply board of the TV.on the power supply board of the TV there are few capacitors and IC.any of this ic is got short or may be due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop.
Take care in solving the problem.....

Posted on May 18, 2011

Testimonial: "thanks bro i will check it out "

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The shutting off problem is probably related to your cooling fans wearing out. There are two fans in that TV one on the left side near the vent hole and one directly under the bulb housing. Typically the one near the bulb goes first. If the fan speed for either fan goes below 900-1000 RPM the TV will shut down. When the fans are going bad you sometimes have to turn the set on several times before they "warm up" and will operate at a speed sufficient to keep the set from shutting down. DON'T KEEP DOING THIS!!! When you turn the set on over and over like that it is putting great stress on the bulb as the bulb doesn't go through the normal "cool-down" mode when you turn the set off normally (and it takes like a minute for the set to completely shut off).

You can check to see if the fans are the problem by turning on the TV and quickly using your remote to access the programming menu to check the fans before it shuts off. Access the "secret" menu as follows; hit the "source" button, then the "up" arrow twice, "down" arrow twice, left arrow, right arrow, left arrow, right arrow and a weird menu will pop up on the screen. Go to the item titled "thermal values" (thermal "something" - I can't remember exactly) and press the middle button in the arrows to select that item. If will show the RPM of both fans - the side fan is #1 and the bulb fan is #2 (the bottom one on the screen). To get out of the menu up arrow to the top and hit the middle button, do the same thing to highlight "Exit" and hit the middle button and your back to the normal screen. DO NOT MESS AROUND WITH THE SETTINGS IN THE "SECRET" MENU OR YOU COULD REALLY SCREW YOUR TV UP!!!

You can get replacements at various vendors on the internet - do a search for "Magnavox 50ML810D cooling fan". They are 90mm X 15mm three lead fans and you will find several sources for them - they range in price from about $10 to $20. They are not that hard to replace - unfortunately for the one under the bulb housing you will have to drill four small holes in the bottom of the TV case to get at the screws without taking the TV completely apart (if you have a really little screwdriver and really little hands you might be able to get them out be reaching in through the bulb access door - I doubt it though). Drilling holes in your TV sounds scarry but the holes only have to be big enough to fit a Phillips screw driver through to contact the screws on the four corners of the fan. Measure from the front of the bulb assembly to the edge of the bottom of the TV and from the side of the bulb housing to the side of the TV (write these measurements down - the point they mark are where the first hole needs to be on the bottom of the TV case). Support the ends of the TV on a couple of chairs or sturdy end tables so you can get underneath it. Use the measurements to mark the location of the first hole, then drill three others 4" apart in a square pattern under the bulb housing - imagine where the four corners of the fan are inside the TV - the idea is to get the holes directly below each corner. Be careful and you won't hurt anything. The screws are in the four corners of the fan on the bottom of the bulb housing. Remove them and the fan will drop off. Then pull the fan wire connector out of the wire inside the set. The new fan may not have the connector on the end of the leads so you may have to strip the leads on the new fan and then cut-off and re-use the old connector - cut the connector off the old fan leaving 2-3" of wire on it, strip the ends of the three wires and just twist the wires from the fan and connector together firmly (at least ten twists) - then use electricians tape on each lead. Match the leads color to color and if the 3rd wire is a different color on the new fan than the old one don't worry about it - connect it to the unmatched wire on the connector from the old fan - the wire that is not black or red is the speed sensor wire. Refasten the fan to the bottom of the bulb housing and reconnect the connector to the lead in the TV.

The fan on the side of the set is really easy to replace. Just remove the vent cover screws, remove the fan, splice the connector onto the new fan leads and reinstall. There's usually only two screws holding the side fan on also.

Good luck!!!

Posted on Jan 08, 2013


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