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07-06-2019, 03:57 AM
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#1 |
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Badcaps Veteran
Join Date: Dec 2012
City & State: Free State
My Country: South Africa
Line Voltage: 220V AC
I'm a: Professional Tech
Posts: 254
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LG 32LE5500 bad video
HI guys, i have this set with bad video, stripy jittery as best i can explain it.
A youtube video is here below https://youtu.be/dqxnZPAzo-U I have attached some pics of the boards. The PSU voltages seem fine with no ripple There are two voltage regulators on the main board and measure 1.5V and 1.8V I suspect the main or tcon but might be wrong since i dont have a schematic for them. Is there any way i can prove its not the main so that i can focus on the tcon? Regards Angelos |
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07-06-2019, 09:19 AM
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#2 |
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Badcaps Veteran
Join Date: Jan 2014
City & State: Point Fortin
My Country: Trinidad & Tobago
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,429
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Re: LG 32LE5500 bad video
Looks like a bad T-CON Bd. to me.
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07-06-2019, 04:07 PM
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#3 |
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Badcaps Veteran
Join Date: Dec 2012
City & State: Free State
My Country: South Africa
Line Voltage: 220V AC
I'm a: Professional Tech
Posts: 254
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Re: LG 32LE5500 bad video
Hi Andrew. Is there any way i can prove it?
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07-07-2019, 01:31 PM
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#4 |
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Badcaps Veteran
Join Date: Jan 2014
City & State: Point Fortin
My Country: Trinidad & Tobago
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,429
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Re: LG 32LE5500 bad video
There a voltages test points on the T-CON Bd. to measure. However, you could disconnect one of the Ribbon cables connecting the T-CON Bd. to the Long Panel Bds. on the Screen. Do left side then right side and see if either half picture shows good or not.
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07-10-2019, 03:38 AM
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#5 |
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Badcaps Veteran
Join Date: Dec 2012
City & State: Free State
My Country: South Africa
Line Voltage: 220V AC
I'm a: Professional Tech
Posts: 254
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Re: LG 32LE5500 bad video
I had done this test and it did not help. The side disconnected was white and the other side was making those same stripes. It did this to both sides. What does this mean? Panel or Tcon or main?
Regards Angelos |
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07-10-2019, 12:40 PM
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#6 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 37,955
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Re: LG 32LE5500 bad video
It looks like main board issue.
Did you try heating or cooling the main board to see if it has any effect? Try that on T-CON too.
__________________
Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
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08-03-2019, 04:54 AM
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#7 |
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Badcaps Veteran
Join Date: Dec 2012
City & State: Free State
My Country: South Africa
Line Voltage: 220V AC
I'm a: Professional Tech
Posts: 254
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Re: LG 32LE5500 bad video
Hi Budm,
I heated the main board and when focusing heat on the processor the fault went away completely. This is a BGA type chip. There is no way i could resolder this chip. This one's going to the landfill. Funny enough it is working fine now, and i did not apply much heat either. |
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08-03-2019, 05:30 PM
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#8 |
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Badcaps Veteran
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 5,632
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Re: LG 32LE5500 bad video
Maybe do a reflow, lots of tutorials on youtube about what temperatures to get to and so forth, sounds like it might respond favorably.
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