I have a hisense model 40k220pw led tv which has no power. Sw on power circuit looks good.nothing blown on power suply.how do I iliminate or isolate very quick to test if the main pcboard is faulty.

SOURCE: reset/power/led etc..lead connections

to,
davewhisner

you have to specify your model no of mother board & brand also full code than i will saw you how to connect that ports with figured out,

THNX

SOURCE: Front panel connections

You can download the complete user manual in English from the manufacturer's website at this link:)

http://support.asus.com/download/download_item_4.aspx?product=1&model=P4B533&SLanguage=en-us&os=17

The front panel connector pinout is on page 2-33, or page 59 in the PDF file. You should have mor ethan enough information to make all the connections you need.

SOURCE: looking for a manual for the motherboard p4v533-mx

If you go to the below listed site, you can download the manual for *********** board. To get to it, on the drop down menu, you will select: Motherboard, Socket 478, and P4V533-MX

http://support.asus.com/download/download.aspx?SLanguage=en-us

SOURCE: Circuit Diagram for HiSense TF2919H PLEASE

I know of no companies in the US that have such a diagram for that item. You will have to contact the Manufacturer ( wherever they are ) to obtain one, if available. The Internet is you best friend at this time.
Sorry and Good Luck.

Ginko

• 19396 Answers
• Posted on Sep 13, 2011

SOURCE: how do I test the y-sustain main board from a

Hi.

As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.


Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.

Regards.

Ginko