I read all of these previous threads:
https://www.badcaps.net/forum/showthread.php?t=15796
https://www.badcaps.net/forum/showthread.php?t=9425
https://www.badcaps.net/forum/showth...t=6930&page=24
https://www.badcaps.net/forum/showthread.php?t=15843
and a few more that were less relevant.
Admittedly, I barely know what I'm doing here but I tried my best to understand the threads.
It seems the results were bad MOSFETs, bad inverter, and maybe the long blue high voltage capacitor(?).
This board seems to be a bit of an "unsolved mystery" compared to the earlier board (BN44-00173A) with the common 3 bad resistors.
In this thread: https://www.badcaps.net/forum/showth...t=15796&page=3
@epicelite sent one of these boards to @PlainBill, (https://www.badcaps.net/forum/showpo...2&postcount=60)
who confirmed it was somewhat functioning,
then it was sent to @Toasty (https://www.badcaps.net/forum/showpo...6&postcount=63)
who said the inverter FETs were dead and apparently solved it with a new inverter (https://www.badcaps.net/forum/showpo...0&postcount=65)
The capacitors are all fine from what I can tell, though I only have a cheap $20 multimeter from Frys and just did the apparently-unreliable "set to High Ohms" test.
Resistors and Fuses all seem fine too.
MOSFETs might be shorted, they are less than 30 Ohms. I don't know if I tested them correctly though. The results were very similar to a mentioned thread (https://www.badcaps.net/forum/showth...t=15843&page=4), something like 0.05 Ohms across the ones on the heatsink.
The Video board is getting 3.75V(IIRC) and 5.25V where it is supposed to, but nothing on 5.0V rails.
The Inverter is getting a short spike of >12V on the 24V rails which immediately dwindles down to 0.01. Those capacitors are fine, and MOSFETs(?) seem fine too. (With my limited testing ability)
Is there a way to determine if the problem is local to the power board or inverter? I will probably try to just replace one of those unless the problem is fairly obvious. (or most likely just toss the monitor, as much as I hate to.)
Could I use the earlier power board unit with the common bad 3 resistors? (BN44-00173A) https://www.badcaps.net/forum/showthread.php?t=9343
Are these units interchangeable?
The larger cap on the right (first pic) had a black marker dot on it. I marked one of the smaller caps on the left with black marker myself, but it turned out to be "probably OK" upon testing, same results as the others.
I suppose it could be the glue?
Any rough ideas of what to do to test if the PSU itself is functioning correctly?
https://www.badcaps.net/forum/showthread.php?t=15796
https://www.badcaps.net/forum/showthread.php?t=9425
https://www.badcaps.net/forum/showth...t=6930&page=24
https://www.badcaps.net/forum/showthread.php?t=15843
and a few more that were less relevant.
Admittedly, I barely know what I'm doing here but I tried my best to understand the threads.
It seems the results were bad MOSFETs, bad inverter, and maybe the long blue high voltage capacitor(?).
This board seems to be a bit of an "unsolved mystery" compared to the earlier board (BN44-00173A) with the common 3 bad resistors.
In this thread: https://www.badcaps.net/forum/showth...t=15796&page=3
@epicelite sent one of these boards to @PlainBill, (https://www.badcaps.net/forum/showpo...2&postcount=60)
who confirmed it was somewhat functioning,
then it was sent to @Toasty (https://www.badcaps.net/forum/showpo...6&postcount=63)
who said the inverter FETs were dead and apparently solved it with a new inverter (https://www.badcaps.net/forum/showpo...0&postcount=65)
The capacitors are all fine from what I can tell, though I only have a cheap $20 multimeter from Frys and just did the apparently-unreliable "set to High Ohms" test.
Resistors and Fuses all seem fine too.
MOSFETs might be shorted, they are less than 30 Ohms. I don't know if I tested them correctly though. The results were very similar to a mentioned thread (https://www.badcaps.net/forum/showth...t=15843&page=4), something like 0.05 Ohms across the ones on the heatsink.
The Video board is getting 3.75V(IIRC) and 5.25V where it is supposed to, but nothing on 5.0V rails.
The Inverter is getting a short spike of >12V on the 24V rails which immediately dwindles down to 0.01. Those capacitors are fine, and MOSFETs(?) seem fine too. (With my limited testing ability)
Is there a way to determine if the problem is local to the power board or inverter? I will probably try to just replace one of those unless the problem is fairly obvious. (or most likely just toss the monitor, as much as I hate to.)
Could I use the earlier power board unit with the common bad 3 resistors? (BN44-00173A) https://www.badcaps.net/forum/showthread.php?t=9343
Are these units interchangeable?
The larger cap on the right (first pic) had a black marker dot on it. I marked one of the smaller caps on the left with black marker myself, but it turned out to be "probably OK" upon testing, same results as the others.
I suppose it could be the glue?
Any rough ideas of what to do to test if the PSU itself is functioning correctly?
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