Re: Imac 24'' (A1225?) PSU bad?
Thanks for your replies so far, here are some pics.
I already measured all Caps in circuit using an ESR-Meter. All of them seem ok to me (in fact they have a suprisingly low ESR)
ESR is between 0.02 and 0.8 depending on Capacity and rated voltage....
Chron-O-John
Member
Last Activity: 11-09-2024, 03:46 PM
Joined: 05-19-2013
Location: NÖ
-
Re: Imac 24'' (A1225?) PSU bad?
already did that, unfortunately no successLeave a comment:
-
Re: Imac 24'' (A1225?) PSU bad?
you mean the Cr2032 battery?
Should be OK. Has 3.05 volts.Leave a comment:
-
Imac 24'' (A1225?) PSU bad?
Hi,
I have an Imac (not quite sure about the model) which does not start. When I turn it on the fans start spinning but there is no picture or start sound.
Diagnostic light 1 & 2 are lit.
I suspect the Power supply (PA-3241-02A1). It has no visibly damaged parts, but I measured the output and the voltages (under load) seem a bit to low to me.
Unfortunately I wasn't able to find an exact pinout, but I measured 11.8 and 2.6 Vols on some pins.
From what I read there should be 12 and 3.3 volts.
Any suggestions what... -
Re: LG 37LF65 backlight goes off
After leaving the unit alone for some time, i tried to narrow down the area with cold spray.
It didnt work. Now cooling down the right board (see post one for pic) seems to do the trick.
I am pretty sure that i didn't cool down the right board during the first try. I'll investigate further and write as soon as i know more.
I'll also try reflowing as soon as i identified the faulty board.
UPDATE!
Ok, update guys. It doesn't seem to be any of the Inverter boards, I think I followed the wrong...Leave a comment:
-
Re: LG 37LF65 backlight goes off
Sorry for not answering for such a long time.
I haven't had much time last months.
So I've bought some freeze-Spray. Cooling down the Left Inverter board makes it run again.
What should i look for next?
Thanks any Merry Christmas!Leave a comment:
-
Re: LG 37LF65 backlight goes off
Hmm... I left the Tv in a room, window open. Didn't work. I guess it is too warm nowdays.
Any other advice for now?Leave a comment:
-
Re: LG 37LF65 backlight goes off
Hmm... where is dimm?
Here are the readings when its [B]not working[/B]:
ON/OFF: 4V
VBR: 3.3V
VIN: 24,5V
Error Out: 0,317V
I'll update this post as soon as it is cold enogh for the TV to work.Re: LG 37LF65 backlight goes off
Hmm... where is dimm?
Here are the readings when its [B]not working[/B]:
ON/OFF: 4V
VBR: 3.3V
VIN: 24,5V
Error Out: 0,317V
I'll update this post as soon as it is coldLeave a comment:
-
LG 37LF65 backlight goes off
Hi,
I have a problem with my TV and I am hoping you can help me.
I've got it from someone else and don't how anything about the process of the problem (if it got worse over time or something else)
The backlight on my LG 37LF65 is not working. When i turn on the TV the backligt is lit for about half a second and then it goes dark. The panel itself is working. If the TV is cold (like outside cold ~ 15° Celsius / 60° Farenheit) it is working fine. I left it running for about 15 minutes.
If the TV is in a warm enviroment it is not working. This is happening...Last edited by Chron-O-John; 10-08-2013, 11:46 AM. -
Re: New Members - please post your introductions here
Hi,
I've been reading silently for a long time. After sucessfully fixing a computer monitor I got a TV and some problems.Leave a comment:
No activity results to display
Leave a comment: