I decided to go for it anyway, will order the part next month with a total of 238.XX bux for the new board. looking forward to see it in action.
aquaangel
Member
Last Activity: 06-16-2012, 10:24 AM
Joined: 06-02-2012
Location: Nanaimo, BC
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
I decided to go for it anyway, will order the part next month with a total of 238.XX bux for the new board. looking forward to see it in action.
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
Thanks, looks like it is the A board from this end as the back light does flicker when i disconnect CN303, i will see if that is worth fixing with a good price for the board, or else it will have to go for recycling. ;-)
the only thing i like about this tv is the fact that it has a 1080P, too bad it is a 40" as mine is 42" but doesn't have the 1080p as it has the 1080i on a Light grey background screen as the Sony is black which i also like.
unless you guys have one for sale around?
Thanks...Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
Sorry, anything about it? just wondering if that tv is worth to fix or not....Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
Reading .06 k ohms from the Pwr supply board.
...
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
WOW, let's do that again, i had the wrong voltmeter earlier to read my resistance. i found my old one now
so Here are the REal readings:
1- 1.66 K
2- 1.66 k
3- .005
4- .006
5- 1.25 k
6- .001
7- .48
8- .48
9- .48
10- .001
11- .001
12- .001
13- .765
14- .001
Sorry about the previous readings....Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
Here are the readings in Ohms / from the pwr supply board
1- 827
2- 846
3- 4.8
4- 4.8
5- 794
6- .1
7- 246
8- 246
9- 245
10- 0
11- 0
12- 0
13- 246
14- 0Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
i tried that harness according to mustang and the problem was still there, Now i disconnected that top right harness, where do you want me to take ohms readings? pins from where to where?
to the PWr supply or the A/V board?
Thanks...Last edited by aquaangel; 06-03-2012, 04:05 PM.Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
k here it goes
on the primary side
There are 2 capacitors of the same size at 100uf at 50Volt, locations
C609-C909
there is also a smaller one at 22uf at 50Volt location c905
all of them from the Primary area.
As of CN1 is the main power source reading more or less 114-120 volt ac.
Cn3 not found and couldn't found even in the schematic manual that you guys provided as a PDF file for that model.
Here are some clearer pic directly to this site
Now...Last edited by aquaangel; 06-03-2012, 03:57 PM.Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
Will do my best to post a clearer picture as i took it with my iphone and will do more testing with voltage readings and will also try to post the pic here instead of my facebook account....
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
this is the Power supply off the tv
i don't have the botom side of it, but i did inspect all the welds and look good so far, no Extra flux laying on the board.
As for my experience:
well i graduated in Audio video repairs like over 13 years ago, so technology sort of got over me, but i still grasp the concept on how they work as i usually try to keep myself up to date with new machines.
i do have the basic tools for repair like the soldering iron, flux and etc. i usually...Leave a comment:
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Re: Sony KDL-40s4100 No Picture/Sound/Backlight
I alos came across one of those Sony tv and have also the same issues, no pictures, so sound and no backlight.
powering the tv up, the Green led is lit and steady.
i have taken the tv apart and took the power supply out and put it back in and reconnect all the harnesses and the problem was still there.
took my voltmeter and took some voltage around the T301 area. at the output? 0V. at the input? over 70 Volt
Could it a bad Relay?
CN501 also had no power
Cn503...Leave a comment:
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