Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

[jimbo71]

A bolt of lightning hit very, very close to our house and messed up a couple of our TV's. TV's are long out of warranty. Due to a high home owner's deductible it's not really worth pursuing a a claim.

So for the NSX-32GT1 it worked very well prior to the incident. After the surge the person who turned it on advised me that it started to come and I believe the power light was on but then no lights and all it does now is a make a clicking sound. I took the back cover off the TV to see if I could find any visual signs of something being burnt out. I didn't see any. I carefully plugged the power cord in to see if could verify where the clicking sound was coming from it was clearly coming from the power supply unit. After removing the power cord and letting it set for a while I looked at the underside of the power supply and din't find any signs of damaged/burnt IC's. I also did the same for the BA board and didn't see any signs of anything being burnt out on the underside.

Also, both TV's were using an HDMI splitter so I have a feeling that this cheap component might have been the weak link that caused the problems. The reason I say this is because the 2nd TV with the problem has a blown HDMI input but everything else appears to work (the HDMI output on the disnetwork VIP722 is also blown but other outputs seems to work). This is the cheap $25 part that monoprice sells and is a powered 1 x 2 splitter.

Any ideas on which internal component is bad? I will try to post some pictures in a few minutes.

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Overall Layout


Power Supply


BA Board


M Board


Power Supply Underside


BA Board Underside

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

I'm leaning towards buying the power supply board first since it's making the clicking sound. Anyone have other thoughts?

[martino]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Can you make a close up picture from the connector on the power board that has the most wires come out of it? It shows printing beside it what tells you what it is,ps-on,stby etc..
Do you have a multi meter?

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Below is a link that shows a closeup of that connector. I don't have a multi meter (or know how to use it) but a friend might be able to help me this weekend

http://i944.photobucket.com/albums/a...ardCloseup.jpg

[martino]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Does the tv start its clicking as soon as you plug it in,or when you press the power button?

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

It starts clicking as soon as you plug in the power cord.

[martino]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

unplug tv,unplug connector cn6150 and the little guy beside it....plug tv back in,still clicking?

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

I gave it a try. The CN6150 goes to the main board (BA board) and the small plug beside of it goes to the M Board.

I tried unplugging it in stages. I first unplugged both connectors and no clicking sound when I plugged the power cord in. I then plugged in the M board and still no clicking sound. I then plugged in the main board and the clicking resumed. Ouch! Does that mean it's more likely to be an issue with the main board rather than power supply?

I kind of jumped the gun and ordered the power supply board from Tri State Module for about $55 along with another part for a different TV. Worst case would be I'm out about $11 for a restock fee plus shipping if I have to send the power board back. Plus, the main board will be a bit more expensive (be lucky to find one for $100).

[martino]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Ok,now it's time to get the multi meter out.
We will be most interested in standby voltage and ps-on for now.
A lightning strike like that often takes out the inputs on a mainboard. Then again a power supply could easily fail with a surge like this. Hence the unplug those connectors and see if clicking is still there. Starting to look like mainboard but we should make sure power supply is ok too. You said a friend has a meter you could borrow?

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Thanks for all the help Martino. I should be able to post an update within the next 2 days.

[xredhawk]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

i got this tv 40 inch model

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

i got this tv 40 inch model

I like this model. It's pretty nice.

[jimbo71]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

I'm happy to report that the TV is now working. I bought a power supply board from Tri State Module for about $55. I swapped it out today and no more clicking. The TV now powers on properly. It's got a total of 4 HDMI inputs. One of them does not work. I'm not sure if it is the one that was plugged in at the time of the surge but it most likely was. When I turn on my LG Bluray player connected to this bad input it will initially show the LG logo and the red warm up dots along the bottom of the screen but after that it doesn't show anything. So it's probably something simple on the main board.

So going from nothing to 3 out of 4 HDMI's working for just $55 I'll call the job complete and consider it a success.

I greatly appreciate the help that people provided!!

[10ecJed]

Sony NSX-32GT1, Power Surge, No video/audio/lights come on

I have the same TV and had a very similar (scary) lightning hit near the house. All my A/V equipment was on a surge protector and all was good there. The TV was plugged directly into the coax cable and it was the closest TV to the underground cable coming into the house near the tree that got hit. The TV went out and NO power light comes on, clicking or any sign of blown fuse.

Would this indicate the BA board that the cable was plugged into is blown? How do I test that? First time user....Thanks!!!

[silva000001]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Hello.
I have the same TV, and am having a similar problem with the TV staying on (NSX-32GT1). I plug in power, and the LED turns red as normal (one loud click). When I try to turn it on, however, it tries to stay on for a few seconds, then turns off and the red LED blinks 5 times, pauses for a few seconds, and repeats blinking 5 times.


I just brought a multimeter home from work today and started taking some volt readings, but before I got too far, I just tried turning it on again and it's working now.

A few days ago, I was able to get it working after a few powercycles, but then it stopped working. Obviously, there is some part that is dying, but I'm not sure what. I measured 120VAC out of the power supply. One weird thing I noticed was R6501 and R6513 were running inconsistent voltages. With the power cable plugged in but the TV not on, they would fluctuate a few dozen volts relatively quickly. I'm not sure what the purpose of these resistors are but it seemed strange to me. I was measuring DC, as AC just showed up as 0V.

Any ideas on what might be happening?
Thanks.

[silva000001]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

^^ To clarify, the resistors are on the power supply board and look like this:

[dskall]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

Need voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.

[budm]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

We need good clear straight shot pictures of the bottom side of the board so we can trace out the circuit in that section where the two resistors are.
BTW what is the full p/n as printed on the white sticker?
4-193-998-????

[silva000001]

Re: Sony NSX-32GT1, Power Surge, No video/audio/lights, just a clicking sound

p/n is 4-193-998-01

I left my multi meter at work today but I'll bring it home tomorrow and get some more readings then.

leaving some pics for now