I have two Dell Monitors that I use with my PC, as 2311 and a 2312.
The 2312 has developed a fault as follows.
It started off with occasionally not being able to power on, after a few attempts it would work and then fail again weeks or days later. Eventually it stopped altogether.
I watched videos suggesting the 3.3V regulator on the logic board but it seemed fine, although I did replace the electrolytic capacitors around it - not convinced that was the problem though.
But now it will power on every time without fail, look like it is working fine for a few minutes but after a while the screen will flicker occasionally (not a continuous flicker just once at a time) and then it will lose signal. At that point moving the mouse will generally bring it back but it will soon go again until it switches off completely (no LED).
At this point I can power off and on and start the whole cycle again.
Figuring it is a power problem, maybe bad electrolytic capacitors. They don't look bulging or leaky. I have no means of measuring the capacitance or ESR.
I could just replace them all but there is an issue
Most are 470uF/35V and 1000uF/16V and 100uF/25V - I can replace those easily and cheaply but there are two awkward ones
82uF/100V and 100uF/450V
I can't get these easily or cheaply - I would have to order from China (the 82uF at least).
Also I don't want to end up spending a reasonable amount of money replacing capacitors that may be fine - although not a lot of money, these are old monitors so I could easily end up spending the cost of just picking up a second hand one instead.
I've looked through the forums for inspiration - these threads are interesting
https://www.badcaps.net/forum/showth...ighlight=U2312
https://www.badcaps.net/forum/showth...highlight=dell
but not the same as what I am seeing.
So I would appreciate any advice on what the issue could be or rule out which capacitors are unlikely to be the problem.
Cheers,
Nigel
The 2312 has developed a fault as follows.
It started off with occasionally not being able to power on, after a few attempts it would work and then fail again weeks or days later. Eventually it stopped altogether.
I watched videos suggesting the 3.3V regulator on the logic board but it seemed fine, although I did replace the electrolytic capacitors around it - not convinced that was the problem though.
But now it will power on every time without fail, look like it is working fine for a few minutes but after a while the screen will flicker occasionally (not a continuous flicker just once at a time) and then it will lose signal. At that point moving the mouse will generally bring it back but it will soon go again until it switches off completely (no LED).
At this point I can power off and on and start the whole cycle again.
Figuring it is a power problem, maybe bad electrolytic capacitors. They don't look bulging or leaky. I have no means of measuring the capacitance or ESR.
I could just replace them all but there is an issue
Most are 470uF/35V and 1000uF/16V and 100uF/25V - I can replace those easily and cheaply but there are two awkward ones
82uF/100V and 100uF/450V
I can't get these easily or cheaply - I would have to order from China (the 82uF at least).
Also I don't want to end up spending a reasonable amount of money replacing capacitors that may be fine - although not a lot of money, these are old monitors so I could easily end up spending the cost of just picking up a second hand one instead.
I've looked through the forums for inspiration - these threads are interesting
https://www.badcaps.net/forum/showth...ighlight=U2312
https://www.badcaps.net/forum/showth...highlight=dell
but not the same as what I am seeing.
So I would appreciate any advice on what the issue could be or rule out which capacitors are unlikely to be the problem.
Cheers,
Nigel
