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Philips VR231/05. Appears dead, power supply is limiting. All fuses including board mounted ones are O.K. Problem first noticed when signal strenght to T.V. went low. Any ideas. Thanks P

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SOURCE: RCA d52W19Byx1

Check to standby voltages, the three of the five and a 7.5 voltage going to the SSB main PCB if these voltages are there most likely have no horizontal drive.  You'll need to replaced the SSB part # 264120. I recommend that you have an authorized RCA servicer replaced the board, convergence data needs to be uploaded to a computer via a chipper checker.  Because a full convergence is quite difficult.

                                      Packman

Posted on Oct 29, 2007

  • 1 Answer

SOURCE: power swith ic went bang!

unfortunately these boards are now obsolete, it may have damaged the bridge rectifier

Posted on Jan 10, 2008

  • 326 Answers

SOURCE: Dead Toshiba A100 laptop computer

In order to replace the power jack in your laptop you’ll have to remove the jack from the motherboard as I explained in the previous post: Replacing DC power jack.
While removing the jack you can accidentally pull out the internal copper coating (I’ll call it a sleeve) from the inside of the “+” terminal as it shown on the picture below.
9807c6d.jpg
The internal copper sleeve has been removed and cannot be installed back. If you solder the power jack back on the motherboard without this sleeve it might work but the connection between the “+” lead and motherboard will not be reliable.
In the following guide I explain how to fortify a damaged power jack connection. You can use this repair technique in some laptops with similar power jacks.
Laptop is dead. How to troubleshoot the problem.In this post I’ll explain how to troubleshoot a dead laptop and find the problem. The following troubleshooting tips are not model and brand specific, they should work for most laptops.
Let’s take a look at two different scenarios.
Example 1. The laptop is absolutely dead. 
When you plug in the power adapter and press on the power button, there is no signs of life at all. The laptop will not make usual noises, LEDs will not light up, the fan will not spin, the screen is blank and black, etc… In short, the laptop is dead.
What you can do in this case?
1. Make sure the wall outlet is working and the laptop DC adapter is getting power from the outlet. Try another wall outlet.
2. Test the laptop DC power adapter, make sure the voltage output is correct. You can test the DC power adapter with a voltmeter.
3. Let’s say the DC adapter is fine and the adapter outputs correct voltage. In this case unplug the power adapter from the laptop, remove the battery, wait for 1-2 minutes, plug in the adapter and try turning on the laptop again.
OK, you tested the adapter and it’s bad. If you decide to replace the original DC adapter with a generic one, you’ll have to follow this rule:
The voltage output on your new adapter has to be exactly the same as on the original adapter. The amperage on the new adapter could be the same or higher.
If nothing helps and the laptop is still dead, apparently the motherboard is fried or there is a problem with the DC power jack. It’s possible the DC power jack is broken and the motherboard is not getting any power from the adapter. In this case you’ll have to disassemble the laptop and replace the power jack. Check out thisguide for fixing laptop power jack.

Posted on Jan 12, 2009

  • 3 Answers

SOURCE: NO POWER AT POWER SUPPLY BOARD EVEN AFTER REPLACING FUSE.

If the mains cord has only 2 pin plug, you can plug it the other way to see if the mains cord has an open circuit at one of the wires. It is not uncommon to find open circuited mains cord for a large appliance like a TV. The degaussing circuit causes a surge in current consumption when you switch on the TV from cold.

Posted on Mar 18, 2009

  • 1 Answer

SOURCE: Philips 51pp9303h/17 dptv345 chassis no audio or video

You hot is part of the HV Generator. One piece. must change the whole generator. The resistors are there, if you dont know where to put them, you have no business trying to monkey with a $2000 tv when electronics veterans like myself put food on our tables by repairng sets. Another point, if you are not trained on proper ESD handleing precautions, your only going to damage more chips and you will end up paying more for a real tech to fix it, IF THEY WILL EVEN TOUCH IT AFTER YOU HAVE BEEN IN IT.

Posted on Apr 24, 2009

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Hi, I have Plasma TV Power Supply Board. The model of board is: LJ44-00144A PS-506-PH. The stand-by voltage 5Vstb works just fine. When I turn on the TV the Stand-by let in front of it comes blue like...


I have the same problem. As I see, here is dead sub PCB with microcontroller on board. Small PCB with 26 pins, mounted verticaly on main, big power supply board. It is not available as a spare part. You must buy complete power supply board LJ44-001444A, as I have done.

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My 32lg30 was shorted out during a lightining strike in a storm the other night. plug it in, and press power, and now nothing works. reset button or replaceable internal fuse? I am tech savvy so I can do...


Hi,

Here are some basic steps that will help you fixing the problem.

I'm assuming that your unit is dead set without an standby LED light and your outlet is live.1.Power cord - check the cord it might be opened (no continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse- sometimes the fuse fail because of the power surge, replacing with new one will cure the problem, If this is the case I would advice you to use surge protector/AVR (Automatic Voltage Regulator). However if the fuse blew again this is an indication that you have a shorted parts in the power supply, you may visit the linkhttp://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and still the unit didn't power up then you have an open parts on the power supply.

4.If you see that the fuse is intact , don't attempt to touch anything because there some fatalcomponents stored electricity enough to hurt you with a simple mistake only. I would advice you to look for a professional to troubleshoot the power supply. If you want to repair it yourself make sure that you have necessary tools and test instrument. First check bad solder joints(re-solder all cold solder), leaky electrolytic capacitor(sometimes it has bulged at the top but not all, you better have a capacitor checker), open/shorted regulator transistor/IC(mounted in heat sink), open fusible resistor (caused by shorted regulator Transistor/IC), shorted zener diode.

You may also replace the entire power supply board, click this LINK.



Hope I helped you.

Thanks for using fixya.



Jdvillanueva

Jun 04, 2011 | LG 32LG30 32 in. LCD HDTV

1 Answer

My philips tv is not working


Hello,

There may be fuse. Some are located where the power cord enters, check the fuses with the use of analog or digital multimeter, but if otherwise The main cause of this power up problem are bad capacitors on your power if the capacitor is bad.
Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


I hope this help in solving the problem....

Nov 04, 2010 | Philips Televison & Video

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Hello. I am a old tech, so struggle a little bit with this unit. It appears that the 12 volt power relay is not getting any signal, thus the 110 is not connected to the first set of power sections. It...


The relay shorts out two power resistors that limit the input power surge. The circuit is complex a bit. An off-line small switching power supply fires up and "heats up" the rest of the circuit for the main power switcher. I have repaired about four of these. Usually a failure due to arcing in the power amp section fries three transistors there and often a Zener diode. This then wipes out the main +/- 70 volt supply. The two IGBT's are usually blown including the four driver traansistors and the switching regulator chip and another small surface mounted transistor and one or both speedup surface mounted 1N4148's. IF THE fuse had been replaced to try again, often the two power resistors (sand coated ceramic) that ar 10 Watt either 10 or 20 ohms will be blown. Some of the hardest thing is to get the heatsinks loose with the IGBT's. When restarting the supply AFTER repair, one puts about 100 Watt lamp bulb in series with the 120 power input to act as a limiting fuse. You will NOT get far with this without a schematic. You can contact me by direct email fredy2 @ aol.com

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Sep 30, 2010 | Philips Televison & Video

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Philips 26 inch 26PF5321D37. It has power to the power board but the system is completely dead. The fuse is ok. Whats going on????


Hello,

Power supply board is die.It can be dead at anytimes.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.


Jun 01, 2010 | Televison & Video

2 Answers

Turn tv on no picture everything else works. turn it off & on a few times maybe more and it comes on and stays on. what could be the problem thanks mike L


Hello,
If everything else works - there is sound and high voltage (static on the screen) - but there is no picture (including no on-screen menus), this limits the likely area of problems is the video output circuitry or CRT filament connections. Check for bad soldering on the CRT ports and around the flyback transformer.

This source of bad connections can result in a variety of erratic symptoms. Check for bad solder connections on the CRT port.

May 28, 2010 | Proview PA-32JK1A 32 in. LCD Television

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I just got a 32 in lcd television and its not turning on. plug is in and no fuses are out but will not turn on


Power supply board is dead.Must replaced the power supply board to get power back.Tries Website Shopjimmy.com,Ebay.com for buy the refurbish power supply board.

Feb 07, 2010 | Philips 32PF5531D 32 in. LCD Television

1 Answer

Power Problem


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