D9200 wave effect

[Breaker]

Hello all,

I've had a D9200 in my CAB for almost 10 years without issue but, recently, I noticed a slight up/down movement on the edge of the
screen when playing games. Upon closer examination, the up/down was actually a slight wave effect rolling through the screen horizontally.
I researched the issue online and there is some indication that this effect could be caused by having speakers (or other magnetic sources)
too close to the monitor however, my speakers are mounted well above the D9200, and I have not noticed this effect in the past. Another
suggestion was to determine if the monitor was close to an EM source (large power supply etc.) as this could create the interference-like
pattern I'm seeing. I can say that I did recently move and have the unit in a condo against a wall where an electrical closet is located. The
CAB is rather large and heavy so I haven't yet moved it to determine if the proximity to this electrical closet is the source of the issue, but I
thought I'd post here to check-in with the experts for their advice on the probable source and/or resolution to the issue.

Thanks in advance for any assistance!

Cheers,
Breaker. 

[grantspain]

i would say that an electrolytic cap or two have gone a bit leaky

[Breaker]

Thanks Grantspain,

It's 10 years old at this point and was stored for the past year so perhaps it's due for a cap kit.
Any idea which caps might be the culprits?

Cheers,
Breaker.

[grantspain]

i would look at all the caps in the power supply section plus any near heat sources such as heat sinks and ceramic resistors

[Breaker]

Thanks grantspain - I appreciate the advice.

Cheers,
Breaker.

[Breaker]

Hi all,

Reviving this old post as I have a follow-up question after a bit more testing.

As my original post notes, I recently noticed a slight horizontal wave effect on my D9200
(approx 10 years old) and the general consensus at the time was that it needed a cap kit.

I did some further testing this weekend and I noticed that the wave effect is different
(ie. slow at 800 X 600 and faster at 256 X 224) and, in some cases (288 X 224) it doesn't
'appear' to be present at all. Before diving into a cap kit I thought I'd post again and ask if
anyone can comment on what I'm seeing - is this still symptomatic of a cap issue? I can
provide additional details as requested to help clarify/troubleshoot.

Thank you for any assistance.
Breaker.

[lilshawn]

did you know capacitor ratings are measured in HOURS not years?

a high quality electrolytic capacitor (like those found in high end audio equipment) can have a MTBF (mean time between failures) in the 8000 hour range. midrange caps (like everything else) in the 6000 hour range... and ebay quality??... well let's say if they work at all.

replace them. 10 years is forever to a cap. and for what they cost is good insurance.

I've spoke with an engineer from wells about this particular monitor series. it has a pretty sizable flaw in it's design.

The TL;DR is: the monitor fails, but the power supply is unusually designed and continues to drive everything and doesn't cut out. (due to overcurrent or over/under voltage) this causes LITERALLY dozens of parts to be blown from a simple dried out cap or blown HOT.

if it fails, immediately unplug the monitor and seek help.

Monitor your caps and the operation of the unit.

if it starts doing weird things, shut 'er down and seek help.

Had a d9200 that had a couple swollen caps...not a big deal... except it took out 1/2 of the components on the board because it got left powered on. I lost count at 20 different components (diode after diode, chip after chip) I found dead... and replaced... AND STILL didn't get it working. I eventually had to give up on it after spending weeks on it.

[Breaker]

Hi lilshawn,

Thanks for the info. and details from WG.

I do consider myself quite fortunate to have gone this long without an issue given
the unit's history and multiple x-country moves. As you mention, caps are cheap
insurance at this point given my relatively benign symptoms, and the possibility
of greater damage if they fail outright.

Time for an email to Zanen for parts.

Cheers,
Breaker.