Hi i picked up this Proscan 37LC45Q tv yesterday and when plugged gets steady blue light but no picture i think maybe a main board issue but not sure... pressing power button does nothing im getting 5v standby and 12v + but dont think im in standby because i believe it should be a red led not blue
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Last edited by whatusername; 05-20-2014, 10:43 PM. -
Re: Proscan 37LC45Q wont turn on
here are the pics i can also take nice close ups of certain parts now with my new toy.. 20X-200X usb microscope
Attached Files -
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Re: Proscan 37LC45Q wont turn on
main board # 9RE01M5380LNA3-B1Comment
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Re: Proscan 37LC45Q wont turn on
Is the +12V there all the time or it goes off when power switch is activated/un-activated?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: Proscan 37LC45Q wont turn on
all the timeComment
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Re: Proscan 37LC45Q wont turn on
Can you make the list of the labels on the 3 white connectors on the left of the power supply board for me? I need to know what they are.
http://www.shopjimmy.com/media/catal...re46ay2700.jpgNever 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: Proscan 37LC45Q wont turn on
top connector 10 pin first 4 = ground 5th blank 6-10 =24v
middle 4 pin no plug but top 2 pins =+24v bottom 2 ground
Bottom 13 pin first pin +12v 2nd +12v no wire, 3-5 ground 6-7 orange +5v 8 purple not sure i think it is still +5v 9 white stb +5v 10-11 yellow stb+5v 12-13 ground no wiresComment
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Re: Proscan 37LC45Q wont turn on
Hmm, I am looking for something like on/off label. Need to locate the PS_ON (ON OFF) pin.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: Proscan 37LC45Q wont turn on
the plug for power buttons go to main board j36 3 wire red white blackComment
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Re: Proscan 37LC45Q wont turn on
Can I see the picture and the label of that 13-pin connector? If there is a pin that has 'STB' label, that will be the same as PS_ON pin.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: Proscan 37LC45Q wont turn on
here u goAttached FilesComment
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Re: Proscan 37LC45Q wont turn on
OK that White wire is the STB (PS_ON) signal receiving pin that gets the Power supply on signal from the main board. When power switch is ON, this pin should be >2VDC (ref to the chassis Ground). So test that pin to see if the main board is sending the signal or not, we need to have this signal for the power supply to turn on. <1 V = power supply OFF.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: Proscan 37LC45Q wont turn on
2,4vComment
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Re: Proscan 37LC45Q wont turn on
All the time? It should toggle when power switch is toggled on and off.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: Proscan 37LC45Q wont turn on
strange now i have a steady red light no more blue but it dont change back to blue when i press buttonComment
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Re: Proscan 37LC45Q wont turn on
all the time it does not changeComment
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Re: Proscan 37LC45Q wont turn on
OK, right now you have two problems:
1) The main board is now working, it has stuck PS_ON.
2) The 12V is working because the PS_ON (STB) is present.
3) The 24V is not working, it should also be on because the PS_ON is present.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: Proscan 37LC45Q wont turn on
i never tested 24vComment
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Re: Proscan 37LC45Q wont turn on
if i unplug the tv then plug it i get the blue led againComment
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Re: Proscan 37LC45Q wont turn on
See if the 24V is present then, it should be there all the time also, if it does, the power supply is OK.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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