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

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I just had a bang outside my window from a power line, and everything flashed for a second. everyting is on now but my LCD TV am i screwed?

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Well, this bang may have cause the TV to blow its fuse, this is the reason why I suggest my clients to by a APC from www.apc.com this will protect your equipment from things like this. If you tv does not come on via power button and a reset solution did not help the n my solutions are:

1 warrenty from the manufacture!
2 if not warrenty take it to a shop to have the PSU power supply unit looked at it.

We cannot provide a FIXYA on this because of the complex issue but we would not mind if you used the FIXYA when rating this information as being useful to you and it is free of charge advice.

Posted on Apr 24, 2009

  • Grand Canyon Tech
    Grand Canyon Tech Apr 24, 2009

    power suply has a fuse that can be replaced if the PSU is dead.

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  • Expert
  • 159 Answers

  • Yes, ***some sets have a good chance to recover from this power drop but some others cannot resist. If you already are sure the tv is totally dead is time to see a technician to replace the power supply.***

Posted on Apr 24, 2009

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1 Answer

Panasonic TC-P50VT20 blank screen with vertical lines


If you wish to get some details; visit the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

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Free tv repair advice


Potentially so, however I would get the TV fully checked over by a professional if it has been subject to a surge. If a component further down the line caused the initial surge replacing the blown cap will only result in another bang as soon as you plug it in.

Mar 21, 2014 | Televison & Video

1 Answer

There is a sound but no picture in to the screen and there is horizontal line


Tv have a Horizontal IC out is dead or cold soldering.Make a fist with ur hand,bang on the tv frame bazel a couples of times.If the hoizontal line flashes back to normal screen?Tv have cold soldering around horizotal IC area.U have a soldering iron tool and a roll of solders,know how to do basic soldering?Take the back of the plastic screw driver tap around for cold soldering area.Resoldering those area.No horizontal tv screen flashes back the IC out is dead,require replacing another horizontal IC output.

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1 Answer

My ACER AT4220B LCDTV has sound but no picture. When powered on the Acer screen flashes on for about 1/2 a second then the screen is black. When connected to a computer the windows desktop flashes and then...


This tv have a 2 long boards call the LCD inverter boards.These 2 long LCD inverter boards are dead.These 2 long LCD inverter boards help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a 2 refurbishes long LCD inverter boards for the replacement.

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1 Answer

Tv desn't turn on,power light just flashes ten times and then stops and then again


Error Indication Information
Error No. Error Information ERROR DESCRIPTION LAMP LED OSD LAMP OFF
(Note 3) (Note 4)
POWER LED TEMP LED
Note:
1.When any of the above errors has occurred, the LED will flash as shown above every 5 seconds.
2.When two or more errors have occurred at the same time, the LED will light up or flash as shown above, and then
change to another every 5 seconds in turn.
3.Warning OSD appears when the Air Filter is clogged 90%, accumulated operation time of the Lamp reaches 5000 hours,
or accumulated operation time of the Air Filter reaches 400 hours.
4.LAMP OFF: The LED will flash right after the Lamp goes off.
5.IC2301 is mounted on LCD Main C.B.A. which is included in the Projection Unit.
6.IC6001 is mounted on TV Main C.B.A.
Clogged air filter
more than 90%
15)
16)
17)
18)
1)
2)
3)
4)
5)
6)
7)
11)
8)
9)
10)
12)
13)
14)
- flashes 5 times -
every 5 seconds
IC2301(pin82) detects the clogged air filter, then indicates the
error when the air filter is clogged 90%.
Front Fan stop or
Lamp Fan stop
flashes orange
once every
5 seconds
- -
IC2301(pin12) detects the Front FAN stop or Lamp
FAN stop, then indicates the error when the Front FAN
or Lamp FAN is stopped.
Lamp Cover open
Temperature Sensor
short or open
flashes orange
twice every
5 seconds
flashes orange
3 times every
5 seconds
flashes green for
140 seconds.
flashing red for
60 seconds.
light up red.
flashes once
every 5 seconds
flashes once
every 5 seconds
flashes red for
10 minutes
flashes once
every 5 seconds
-
-
-
-
Abnormal
Temperature
flashes twice
every 5 seconds
flashes twice
every 5 seconds
- -
Request for Lamp
Replacement - - lights up
Power Ballast Error
(abnormal
Lamp voltage)
- -
flashes 3 times
every 5 seconds
Power Ballast Error
(abnormal
temperature)
- -
flashes 4 times
every 5 seconds
Power Ballast Error
(other causes) - -
- -
Request for Filter
Cleaning -
Abnormal Voltage
on 16 V line of
LCD Main C.B.A.
-
flashes twice
every 5 seconds
flashes twice
every 5 seconds
Abnormal Voltage
on 14 V line of
LCD Main C.B.A.
-
flashes 3 times
every 5 seconds
flashes 3 times
every 5 seconds
Abnormal Voltage
on 7 V line of
LCD Main C.B.A.
-
flashes 4 times
every 5 seconds
flashes 4 times
every 5 seconds
IC2301(pin76) detects the Lamp Cover Unit condition
(open or close), then indicates the error when the
Lamp Cover Unit is open.
IC6001(pin85) detects the Duct FAN stop, then
indicates the error when the Duct FAN is stopped.
IC2301(pin74 and 75) detects open or short of the Temperature
Sensor (R2911) on Front Thermistor C.B.A., then indicates the
error when Temperature Sensor is open or shorted.
(The error is not detected for 1 minute after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Front FAN by the Temperature Sensor (R2911) on Front
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 43 C (109 F).
(The error is not detected for 1 minute after Lamp ON.)
IC6001(pin86 and 87) detects open or short of the
Temperature Sensor (R2901) on Lamp Thermistor C.B.A.,
then indicates the error when Temperature Sensor is open or
shorted.
(The error is not detected for 4 minutes after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Lamp by the Temperature Sensor (R2901) on Lamp
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 60 C (140 F).
(The error is not detected for 4 minutes after Lamp ON.)
IC2301(pin11) detects the error of LCD Power C.B.A.,
then indicates the error when the temperature fuse
(117 C)(243 F) in LCD Power C.B.A. is open.
IC2301(pin11) detects the error of LCD Power C.B.A. and Lamp,
then indicates the error when an inner malfunction of LCD Power
C.B.A. occurs, the Lamp voltage becomes more than 130V or
less than 30V, Lamp current becomes more than 5A, or the Lamp
is cracked.
IC2301(pin11) detects the error of the Lamp, then indicates the
error when the Lamp is short-circuit.
IC2301(pin48) detects +16V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +13V.
IC2301(pin47) detects +14V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +11V.
IC2301(pin45) detects +7V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +5.7V.
IC2301(pin44) detects +3.3V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +2.5V.
flashes 3 times
every 5 seconds
flashes 4 times
every 5 seconds
Abnormal Voltage
on 3.3 V line of
LCD Main C.B.A.
-
-
-
- flashes 5 times
every 5 seconds
Forced cooling
The failure of Lamp
light up
-
Temperature Sensor
short or open
-
-
Abnormal
Temperature
Duct Fan stop -
When accumulated operation time of the the Lamp reaches
5000 hours, OSD (replacing the Lamp) appears on the screen.
Note: The Lamp time is stored in EEPROM (IC2305).
When accumulated operation time of the Air Filter reaches 400
hours, OSD (cleaning the Air Filter) appears on the screen.
Note: The Filter time is stored in EEPROM (IC2305).
During forced cooling, this indication is indicated.
IC2301 (pin11) detects the failure of light up processing of
the Lamp, then the POWER LED is changed as follows.
1) POWER LED flashes green for 140 seconds (while turning on).
2) POWER LED flashes red for 60 seconds (while cooling).
3) POWER LED lights up red (standby).
Note: If the Lamp will not light after attempting turning on the
power 2 or 3 times, the Lamp, the LCD Power C.B.A. or the
LCD Main C.B.A. may be defective.
Error Symptom Problem Possible Solutio

May 30, 2010 | Panasonic Viera TH-50PX80U Plasma TV

2 Answers

The tv had a bang noise no picture lot of lines on part of the screen


Sounds like a blown capacitor within the power supply or inverter section if it banged then you should be able to visually see the damage. Service tech may need to look at it depending on your confidence to remove covers.

Jan 06, 2010 | Vizio VX42L 42 in. LCD TV

1 Answer

55" TV keeps shutting off automatically


Green light flashes 5 and then red light flashes 6

Sep 14, 2009 | Sony KDF-E55A20 55 in. LCD Television

1 Answer

Flashing OPC/DL light


Here's what I did to fix issues with my 37D5U - do at your own risk:

***Follow the instructions below to fix the same issue in your LC-37D5U tv***

Do this test first to confirm the failure:
(1) Connect the cable line to the tv.
(2) With the tv unplugged, hold down the Input and Volume-Down buttons simultaneously, then plug in the tv.

Expected result:
(a) You should hear the tv come on in the service mode; the OPC/DL and power lights on the front of the tv should turn green and blue, respectively.
(b) The broadcast sound should come through the speakers, but you will probably still have no picture or back light.

If your test yields the expected results, proceed to the fix.


Fix
===

Parts Needed
------------
(1) Part type: Fuse
Location on circuit board: F705
Official Part No: QFS-A1154SNEZ
Replacement Part No: BK/PCB-1-R (Mfg: Cooper Bussmann - about $2) or the original QFS-A1154SNEZ (Distributor: Sears Parts Direct - about $14)

(2) Part type: Mosfet (4 of them)
Location on circuit board: Q723, Q721, Q719, Q717
Official Part No: k3469
Replacement Part No: FQPF13N50C or FQPF13N50CF (Mfg: Fairchild Semiconductor - about $2 each)

Fuse F705 is part of the circuit on the power supply that powers the inverter circuit, and the inverter switches on the back light for the tv. The mosfet at location Q723 was suspect when I tested it, so I went ahead and replaced it and the other three mosfets "chained" to it as preventative maintenance. Parts can be bought from digikey.com - digikey is usually a same-day shipper with the best prices, so I use them. USPS Priority shipping is the best bang for your buck.

Tools Needed
------------
Philips screwdriver
Soldering iron
Desoldering braid or some other solder remover
Light bulb socket that has two wires running from it and a clear 100-watt light bulb - Home Depot sells the sockets. Alternatively, you can use a 2K ohm/10W resistor
Multimeter - not necessary, but helpful

Procedure
---------
(1) **Important: Make sure the tv is unplugged**

(2) Remove the back cover and stand - there are a bunch of screws holding the back cover on. You can either mark the screw locations and bag the screws or do what I did: Unscrew the screws, leaving them in their holes, then slowly lift the back cover off and carefully set it down with the screws intact.

(3) Set the tv on a flat surface with LCD panel facedown and remove the AC power cable.

(4) The board you want to work on is the power supply board (see pic below), which is the board where the AC power cable connects. Carefully detach the connectors that connect to the other boards in the tv from the power supply, then remove the screws that hold the power supply to the back of the tv and lift it off the tv by holding it by its edges.

(5) Locate the four large 450V capacitors at locations C734, C709, C710, and C852 without touching them (they look like soda cans). Flip over the power supply board. Touch each wire of the socketed light bulb or resistor for about 3 seconds to the negative and positive leads of each large capacitor, respectively; polarity is irrelevant. This discharges the high voltage from the capacitors so you don't get shocked while working on the power supply. The voltage usually slowly dissipates on its own, but it's better to be safe than sorry when you're talking about a potentially lethal 450V. Check the voltage with your multimeter in the appropriate DC mode to verify that the capacitor voltage has been drained; if you don't have a multimeter, just continue on.

(6) At this point, you can verify that the fuse at location F705 (looks like a small black box) has indeed failed by holding the multimeter's red and black probes on the fuse's leads with the multimeter in continuity mode. If you have no continuity, the fuse has internally failed; proceed to the next step.

(7) Desolder the fuse from location F705 and desolder the mosfets from locations Q723, Q721, Q719, and Q717 then replace with new components.

(8) Put the power supply board back in the tv, using just a couple screws to hold it in for now. Reattach the connectors to the power supply.

(9) Attach the broadcast cable line.

(10) Reconnect the AC power cable to the power supply (don't plug it into the wall socket). Hold down "Input" and "Volume-Down" simultaneously, then plug in the tv. The tv picture and sound should come on.

(11) With a small screwdriver or other probing device, depress the Reset button, not the System Reset button; it's the last recessed button below the cable jack on the back of the tv. The tv will reset, then you should get sound and a picture from channel 2.

(12) Reinstall the remaining power supply screws, back cover, and stand.

May 26, 2009 | Sharp Televison & Video

1 Answer

Samsung LCD 40 inch LNT4061


Howdy,
It sounds like you have a Power Supply Board problem. The PSB is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.

Thanks for using FIXYA, big IRISH.

Dec 31, 2008 | Samsung LN-T4061F 40 in. LCD HDTV

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