Question about Philips HTS3400/37 System

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I am trying to fix my Philips HTS3400/37 (power issue/blinking light/service manual)

I have the blinking light issue mentioned a few times here. I have been trying to troubleshoot it. I have found one bad capacitor (C985) And found that no voltage on lead 12 of IC952. I called Philips to try and get a service manual but they will only charge me to replace the system. How frustrating. I can easily get the parts I need if I can figure out where the problem(s) are found. Have any experience with this problem or know where I can get a schematic of the power supply board? ANY help would be greatly appreciated! Thanks!

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  • alystric Dec 31, 2008

    I noticed one day that the light was blinking on my dvd player and it wouldn't come on. I don't know about schematics or anything but I read from a user of this site that it was probably a capacitor. So, rather than send it to a professional and pay $100+ to have it fixed, I replaced one obviously ruined capacitor on the motherboard and it worked like new. (C984 . . I think . . .) It cost about $13 for the parts and s&h and took me all of 45 minutes. I don't know if this can help but I just wanted to confirm that post I read. I did fix it by only changing one capacitor.


5 Suggested Answers

  • 20 Answers

SOURCE: 470uF capacitors

The 470uF/25V Caps are in the middle of the PCB alongside of the slab-looking aluminum heatsink. You should be able to see that the tops are popped up and the glue around them is brown from overheating.

Posted on Jul 26, 2008

  • 3 Answers

SOURCE: Capacitors - Philips HTS3450 System Problem

If you could post or email a photo that would be great.

Posted on Aug 19, 2008

  • 138 Answers

SOURCE: philips 42pf7321d/37 blinking power board question

The probleis with one of the maina boards and trouble shooting would have to be done to see which board is bad.

Posted on Aug 19, 2008

  • 1 Answer

SOURCE: Philips FlatTV Black Screen 30PF9946D/37

I have the same problem and was told by my local TV repair shop I needed a new LCD panel (at $2000!!!) which I don't believe for a moment since the panels themselves rarely fail. After digging around on the net, I came across a posting from "Arfa Daily" on the website which points to either the backlight inverter board or the power supply. So far, it is the only intelligent thing I've found that makes any sense. If anyone follows this up and sucessfuly repairs your set, please let me know! ....Acepayday

I will re-post his/her answer here but to read it yourself goto:

  • Date: Wed, 14 May 2008 10:07:05 +0100

"Max" <maxg70@xxxxxxxxxxxx> wrote in message
sstepanov@xxxxxxxxx wrote:
Hello! I have a Philips 30PF9946D/37 30" LCD that no longer turns on.
Upon pressing the power button, the status LED goes from green to
amber then to red.

Is this a common problem with these?

Thank you!
Could be ps board.

It's a common problem with all LCD TV sets. First, try unplugging the
display panel's backlight inverter board. It is very common for these to
fail and cause the set to revert to standby. Otherwise, it's most likely
that the PSU itself is faulty - also very common.

Examine it *very* carefully for bulged electrolytics on the secondary side.
Note that these may be 'hiding' under bits of heatsink, so look carefully.
Also, check all large and heatsink-mounted devices, for bad (lead-free !!)
joints, which is another common cause of your described symptoms. Other than
this, you're a bit 'on your own' with LCD sets. There are other possible
causes, such as bad sound output chips, but if you really do have a power
supply problem that's not one of the things described, then you will
struggle to get to the bottom of it without schematics, and an intimate
knowledge of switchmode power supplies. These LCD ones are infested with
monitoring circuitry for output voltages and over-current conditions, and
they all work on the standby supply, so if *any* unexpected condition is
detected either at startup, or during use, the standby supply is momentarily
stopped, which causes the system control micro to reset back to its 'sleep'
condition, removing the 'power on' signal to the power supply. Depending on
the set, that may then be an end to it until you try to bring it out of
standby again, or it may just keep trying on its own, causing a flashing
power light.

If you can prove which board is causing the trouble, you might want to
consider just replacing that board. PSUs and inverters for many sets, can be
found astonishlingly cheap on the 'net and e-bay sometimes.


Posted on Nov 24, 2008

  • 26 Answers

SOURCE: Philips 42PFL5332 TV wont turn on

the flashing is the output of an error code

get the service manual

Posted on Dec 11, 2008

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