Question about Philips 37PF7320A 37 in. HD-Ready LCD Television

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TV turns off for no reason and comes back on

TV shuts off and then comes back on in about fifteen seconds. Have had a new circuit boad replaced and still the same problem

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  • Anonymous Apr 30, 2008

    screen goes black and comes back on

  • Anonymous May 05, 2008

    None

  • kkorycin Oct 26, 2008

    same problem witha philips lcd tv, firmware update did not fix the issue, from what ive seen on the web updating firmware didnt help anyone. Im afraid I got a pretty big 800 dollar paperweight since phillips customer support is just about worthless.

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Apparently this is a firmware (software) problem that has been fixed via a software upgrade. You can download it from Philips' web site, copy it to a flash drive, and load it into your TV via the USB port. I did, and this problem has not returned.

Posted on May 11, 2008

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Tv turns on and screen flickers on for a second and then turns off, whats the issue?


Sounds like Back - light problem.Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis.If you wish to get some details; check the site linked here.Surf the site with patience.Pull up older posts.It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS].In such cases, the power supply board might need replacement.To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself.If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board.If this is the case, you have to replace the main board.

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1 Answer

Tv won,t come on makes beeping noise


Try unplugging from outlet for fifteen seconds. Press the power button for a few seconds "before" plugging back in. Now plug back into the wall outlet and try turning it on to see if this reset the TV's settings.

Sep 28, 2014 | Emerson Flat Panel Televisions

1 Answer

Anyone know how to fix a Panasonic Viera 50" Plasma that powers off a couple seconds after powering on?


tThe diagnostic circuits is shutting your TV down. In most cases the set will shut it down immediately. Apparently your set hasn't shut completely down yet. When you turn your TV on the diagnostic circuits send a low voltage, low frequency signal through all the circuits and depending on how they come back whether the sets powers up to full power. If a problem is detected it will shut down to protect the other circuits. It sounds like you might have some capacitors going bad on your power board. A capacitor that is going bad would let it come on for a few seconds then the diagnostic circuits would see the capacitor getting further out of tolerance and shut the set down. If you are a DYS type person you might want to lay it flat of it;s face and remove the back. A bad capacitor will be bulged out on the top. are Replace capacitors with the exact uf value and if you can go above the rated voltage but never below., If this isn't the problem then it is probably the main board (the board where your cable hooks up to), There are other things that cab causes for this but I would check the capacitors first.
Col. Dana Gillespie

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1 Answer

26la30q wont turn on


Hi
You have to start checkin from its main ON/OFF switch itself. If the switch have any contact contact trouble, the set will not turn On, even though you hear the click sound from the switch. If switch is Ok, then you have to come to the power supply regulator board. It can be easly recogonized the powe supply regulator boad. The main supply line will go straight to it. There will be more that 5 or mor secondary voltages from it, according to Tv model. These secondary wupplies will energzed only after the power supply switching circuit work properly.
Ther is a fuse [ a cartridge type; replaceable]. Check the fuse first. If it has blown; be carefull when you replace it; because there must be some reason for the blowing of that fuse. It is really a protection device. Before replacing it, you have to check the entire power supply board for some short circuit. If you have sound knoledge in repairing Switched Mode Power Supply [SMPS]; just proceed. Otherwise get it repaired by any experienced service technican or by authorised service center for Proscan. OK.

Jul 08, 2011 | Proscan 26LA30Q 26 in. LCD Television

1 Answer

This TV has Model number 2404141 serial number H466DD2D7 also ATC 106 and service # 2404141T This is a relative's set. When turned on, either with the remote or button on the cabinet, it acts as...


id suspect power supply boad is faulty......
if you can use a soldering iron.............
replace the caps on the board..........or search ebay for a replacement board........
cheers

May 02, 2011 | RCA Flat Panel Televisions

1 Answer

Power comes on for two seconds then goes off. Trouble code is 21. Is this worth fixing?


The X-Ray Protect circuit monitors:
* Excessive High Voltage
* Excess CRT Beam Current
* Excess HV Circuit Current

The X-Ray line is normally High. If any of the monitored sources exceeds its' specific reference, the X-Ray line is pulled Low, shutting Off the TV. If X-Ray protect shuts the TV Off, pressing the Power button will turn the TV back On ( it will shut Off again if the problem still exist).

Possible Problems: Power Supply Fault, Sweep Circuit Problem, Doubler Board Fault or a leaking CRT. You may have bad capacitors in the power supply or the sweep power supply.

Check for CRT leaking, few drops of clear light oil. If this is leaking the fix is costly and not worth fixing.
Inspect for puffy capacitors on the power supply and sweep circuit boards, if you can solder replacing capacitors is cheap, middle pricing for replacing power supply or circuit boards.

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4 Answers

My Sanyo DP42848 has audio but no picture. How can I fix it?


i turn my sanyo on and its all good for a few seconds then i loose picture but still have sound ,,whats wrong?

Jan 21, 2011 | Sanyo DP42848 LCD TV

1 Answer

Every ten to fifteen minutes the screen goes blank and no sound then in about 5 seconds the picture and sound comes back on, Vizio tv 42 inch, this also happens when when a cd is being watched


It can be that the 12/24vdc power supply go into shut down mode due to short circuits in the backlight inverter board. You need to check the output voltages of the power supply with and without the backlight inverter board connected to the power supply.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

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2 Answers

Sony fb3 boad kdl40v3000 Our tv would not turn on except the flashing standby light. Technician told us we need to replace the fb3 board. The cost is $395 for the board and $185 labor. Is this reasonable?...


This is not a unusual amount for repair. Most repair facilities do not like using used parts on sets they have to warranty after a repair. They would then be liable if were to fail and then they would be replacing it at a greater cost to them. You could check with Sony and see what their retail cost is on the part. Their Customer Service Line is 1800-222-SONY.
I hope this helps,
skyassoc

Jul 24, 2009 | Sony BRAVIA KDL-40V3000 Television

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