Hello! I hope to get some help with a Haier L32F1120. It has a green light but does nothing when the power button is pushed, just stays green and no picture or sound. I had a look at the power supply and no bulging caps or anything that looks like it got hot so I tested the voltages at the plug and they are all there as to what is printed on the board next to them so I'm kind of at a loss on what to check next.
Haier L32F1120 Green but no go
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Re: Haier L32F1120 Green but no go
In your picture of the control board, upper right corner there is a connector with two wires. Do they go to the inverter? Are they called something like DIM, BLK etc? If they are, what's the voltage on them?
Do you get a backlight if you press and hold the power button for about 10sec?Comment
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Re: Haier L32F1120 Green but no go
Ok, just to make sure:
- ALL voltages from the PSU are ok and the LED turns blue when powering on the unit and stays blue when pressing the power button.
Then the problem seems to be the main control board. It either does not recognize you pressing the button or there is something else wrong with it.
There is a schematic of this board in the link I posted.Comment
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Re: Haier L32F1120 Green but no go
So no 24V on CON2? Can we see the whole back side of the unit so we can see how all the boards are connected together?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: Haier L32F1120 Green but no go
Per schematic, what DC voltage do you get at pin 5 (Power on/off, this signal is generated by the main board and it is sent to the power supply board to turn on the 24V AND 12V power supply section) of J15 of the main board when power switch is activated? It should toggle between <1V and >2V when power switch is toggle on and off.Last edited by budm; 03-12-2014, 08:59 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: Haier L32F1120 Green but no go
Right now it stuck high, that is why you are getting the 12V and the 24V. The main board is the problem at this point. Have to look further on the main board, checking the voltages of the LDO (Low Drop Out) regulator ICs will be a start.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: Haier L32F1120 Green but no go
Please read and report the reading in the format as instructed. I see 3 (the device with big tab on top and two legs on the bottom) of them on the board so far.
https://www.badcaps.net/forum/showth...999#post300999Never 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: Haier L32F1120 Green but no go
schematic starts here: http://www.manualslib.com/manual/513...page=26#manualComment
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Re: Haier L32F1120 Green but no go
Here is the service manual.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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