Just picked this tv up today. Power led flashes, every 20 seconds you can hear some kind is start up music or chimes but that is it.
Samsung LN40A500 not turning on
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Re: Samsung LN40A500 not turning on
BN44-00199A Power supply-Inverter board combo.
Check and see if you do have PS-ON signal from the main board, if you do then check the dcv between the two legs of the main filter cap to see if you have close to 400VDC or not.
Notes: the power supply boards does not have pull-up resistors to do the self test of the power supply.Attached FilesNever 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=24809Comment
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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=24809Comment
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Re: Samsung LN40A500 not turning on
Nope. Just left it cycling, every 20 seconds the chimes where going, while I checked the voltages that comptek asked for and after I finished I realized I hadn't heard the chimes.
I turn the screen and its on.
All the voltages on the main connector match.Comment
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Re: Samsung LN40A500 not turning on
Shopjimmy has a kit for $20 to fix the main board with these symptoms.
http://www.shopjimmy.com/samsung-bn9...repair-kit.htm
Service on eBay to do it for $40. I can't do these surface mounted things.Last edited by Malachi; 04-20-2016, 03:49 PM.Comment
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Re: Samsung LN40A500 not turning on
Oh yea, the famous C102 problem.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=24809Comment
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Re: Samsung LN40A500 not turning on
C102 on those board are common failure that causes the TV to power cycling or make squealing sounds through speakers. Just do the search for C102 on Badcaps.
https://www.badcaps.net/forum/showth...ht=C102&page=7
post 129, 135.Last edited by budm; 04-20-2016, 03:52 PM.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=24809Comment
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Last edited by budm; 04-20-2016, 04:31 PM.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=24809Comment
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Re: Samsung LN40A500 not turning on
Aaron has done a few of these for me. Great work, FAST tunraround. Much better than me trying the fix myself...
http://www.ebay.com/itm/Samsung-LCD-...0AAOSw1vlUr8~QComment
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