Picked this up last month without a power supply. After getting the correct Apple power supply, 24.5v, unit would not turn on. After I disassembled, was able to verify that it is getting power. Caps appear to be United Chemicon KZH - using ESR meter, they measure OK. I have 24.6v across 5 caps at bottom, nothing across the two @ mid photo. Sometimes the LED, circled in yellow will come on when energized, sometimes not. Regulator in red is 1117-3.3, but am not getting a reading. Switcher in red, from top down reads, 5.03,24.6,14.91,0,0,5.01,6.31 volts. Lots of small SMD stuff!! Need help to get power. In testing small transistors - E to C should be open?
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Apple Cinema Display 20"
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Re: Apple Cinema Display 20"
Originally posted by styxbound View PostI've had one of those things for quite some time now with no power supply. The supplies I've found are super high priced, and I saw something which said you had to have a G4 or G5 Mac to use it. What kind of info do you have about all that?
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Re: Apple Cinema Display 20"
Well, the good part about mine is that it was free. The bad part is that it makes me sick just sitting here when I so much want to use it. Keep hoping I'll somehow acquire the necessary Mac to use it.
P.S. From what I could find on Google this thing cost $1100 or more originally.Last edited by styxbound; 02-13-2011, 03:23 PM.
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Re: Apple Cinema Display 20"
Just wondering trwilson70 have you had any luck with you cinema display I have two of them a 20 and a 23 inch not working I can get them to come on most of the time buy cycling the power on and off a couple of times I have checked the 23 inchs caps and reg. and they seem ok.
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Re: Apple Cinema Display 20"
http://s807.photobucket.com/albums/y...ema%20Display/
http://s807.photobucket.com/albums/y...y%2023%20inch/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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Re: Apple Cinema Display 20"
budm which 3.3VDC REGULATOR would you recomend? Is this one ok http://www.digikey.com/product-detai...483318?cur=USD ?
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Re: Apple Cinema Display 20"
3.3v 1A Fixed, that should be fine.
Does the output read close to 4vdc?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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Re: Apple Cinema Display 20"
That is bad, when it failed, it can be higher or lower than what it should be.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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Re: Apple Cinema Display 20"
Great!
Most people on youtube will tell you to mask off the sensing pin on the power connector or buy new power supply, but if the regulator puts out 4v or higher, then sooner or later the main board may be damaged.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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