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Sony MFM-HT75W 17in Multifunction Display

My Sony MFM-HT75W 17in Multifunction Display shuts off 3 seconds after being switched on. Green power button stays lit but the screen goes blank. It doesn't matter what the input is: TV, PC, video

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  • monikhurana Jun 01, 2008

    Hi,

    when the system starts the screen looses the pixels the fonts becomes BIG; we have to go the properties to re adjust it. Can you please help?

    RGDS,

    MO

  • jeanfb May 11, 2010

    Do you know witch chip ned to be change?

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Picture not clear with white colour

Posted on May 29, 2012

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Hi, I was able to fix my set by changing only three out of the six capacitors between the heat sinks opposite the plug on the board. I noticed under a microscope the caps looked a little puffy, but not much, and I checked them with a capacitance meter, but they were in tolerance, but decided to change the three closes to the edge of the board with a 1000uf, 50v, 1000uf 25v and 1000uf, 50v with the one that is 25v going in the middle, I didn't have another 1000uf,50v for the middle one. (sometimes you gotta use what you got to get what you want) So I powered my set up and it stays on . I hope this helps. I may go back and replace all six with 1000uf, 50v, but the space in there is limited and those are some large caps. I will wait until the set acts up again before i do that. I am satisfied with it for now. Again I hope this will help with what you've got going on with yours.Sony MFM-HT75W 17in Multifunction Display - 10_25_2011_8_27_53_pm.jpg

Posted on Oct 25, 2011

  • Sol Vit Forya
    Sol Vit Forya Oct 26, 2011

    I noticed the tv still went off after 5 seconds when I put it back together, so I removed the shield that covers the power supply and main board, and for some reason that fixed it, not sure why though.... .. . Maybe the shield shorts something out on the board, it's a mystery, but I hope it helps.

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Hi Pacmanjones

Has to replace the SONY device, or send to repair shop (certified sony dealer) it is a fried chip that change the signal to the other devices. if you had warranty, use it! I thing is 3 years?
Good Luck

Posted on Nov 26, 2007

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Posted on Jan 02, 2017

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I have a similar problem. Just found out a possible solution yesterday. I am waiting for my lamp but here's what you need to do if you have replaced your lamp. Go into self diagnostics mode: Switch of your TV via remote, you will see red standy by light. Now,on the remote press "Display"=>"Channel 5"=>"Volume Up"=>"Power Button". All these keys need to be pressed within 3 seconds. You will now enter the diagnostics mode. Press "Jump" on remote (bottom right) 3 times and then press "Channel 2" 9 times. The screen will display your current lamp hours used.

In order to reset your tv to factory settings and for the new bulb to work you must reset this timer or else your TV will assume you are still using the old bulb and will automatically kick in "over protection mode". So here's what you do once you do on the lamp hours display screen. Press the "Channel 3" button on the remote 3 times then "Mute" then "Press Enter" to reset the timer to zero. Your TV should now work as normal. And remember, whenever a part is replaced all factory settings must be reset to zero. To do this, follow "Display"=>"Channel 5"=>"Volume Up"=> "Power Up" to enter service mode. Finally, press "Channel 8" and then "Enter" to put the TV back to factory settings.

The above mentioned is usually performed by a service technician and they charge somewhere around $95 diagnostic fee. You just saved this charge. If you see flashing red lights count them when they flash in sequence. This is a code for the techs to tell them what is wrong. These flashing red lights sequentially flash from 0 to 10 times to identify a problem. Usually, when the bbulb goes bad the only thing that might need to be replaced would be a "lamp Driver" aka "Power Block Assembly" $116.25 online from Sony, or the ballast. Sometimes, if you do not have a video a Thermal FUse can go bad which only costs $4.80 for the KDF60-XS955 but the techs will charge you over $300. You can do this yourself if you can get your hands on a service manual.

Hope this info helps.

Good Luck to you all.

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