Hello there,
This is my first post, so please feel free to let me know where there are bits of information I haven't covered (or tell me that I haven't done enough work yet to be asking questions!)
I have a Hyundai N91W monitor which will operate for only 3 or 4 seconds at a time. The monitor powers up, displays a perfectly good image, then immediately switches to standby. The monitor will happily start-up again, simply by pressing the front-panel power button, but almost always switches off after a few seconds. Once in a while, it is possible to get the monitor to stay switched on (normally after about 40 power cycles - I'm persistent if nothing else). It will then stay on without problems until it is powered down (this includes screen-restarts when changing resolutions, or the PC going to sleep). It is then once again a matter of perseverance to get the monitor into a usable state.
From the information I've read on the internet I think that there are possibly bad capacitors on the power inverter. I've taken the monitor apart and had a good look at all the components. Using this guide I have identified 3 capacitors (2 x 680microfarad 25V and 1 x 470microfarad 25V) on the power inverter which don't appear to be charging.
I should mention that there are no signs on any of the component boards (that I can see) of any burst/swollen caps, heat damage or anything else which looks out of place.
The monitor is out of warranty, so I'm happy to play around with the innards, but I only have the most basic equipment (multimeter - without ability to test capacitance, screwdrivers, soldering iron, etc).
Having looked on this forum, I can only see one thread that mentions the N91W in a related problem, and the poster says they replaced a large number of capacitors on their power inverter.
I would like to ask the forum if, given the symptoms described, my current course of action seems appropriate, and if they would recommend any other steps I could take to try and track down the problem.
Many thanks in advance.
This is my first post, so please feel free to let me know where there are bits of information I haven't covered (or tell me that I haven't done enough work yet to be asking questions!)
I have a Hyundai N91W monitor which will operate for only 3 or 4 seconds at a time. The monitor powers up, displays a perfectly good image, then immediately switches to standby. The monitor will happily start-up again, simply by pressing the front-panel power button, but almost always switches off after a few seconds. Once in a while, it is possible to get the monitor to stay switched on (normally after about 40 power cycles - I'm persistent if nothing else). It will then stay on without problems until it is powered down (this includes screen-restarts when changing resolutions, or the PC going to sleep). It is then once again a matter of perseverance to get the monitor into a usable state.
From the information I've read on the internet I think that there are possibly bad capacitors on the power inverter. I've taken the monitor apart and had a good look at all the components. Using this guide I have identified 3 capacitors (2 x 680microfarad 25V and 1 x 470microfarad 25V) on the power inverter which don't appear to be charging.
I should mention that there are no signs on any of the component boards (that I can see) of any burst/swollen caps, heat damage or anything else which looks out of place.
The monitor is out of warranty, so I'm happy to play around with the innards, but I only have the most basic equipment (multimeter - without ability to test capacitance, screwdrivers, soldering iron, etc).
Having looked on this forum, I can only see one thread that mentions the N91W in a related problem, and the poster says they replaced a large number of capacitors on their power inverter.
I would like to ask the forum if, given the symptoms described, my current course of action seems appropriate, and if they would recommend any other steps I could take to try and track down the problem.
Many thanks in advance.
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