Just detected a design flaw in my Cintiq 21UX and this may be present with the later models - 22HD and 24HD.
Please view photos.
While I was resting I heard a crackling noise from my desk. I have 3 monitors bunched together so I leaned over and tried to work out where the noise was coming from. Identifying that it was from my Wacom I looked at my multiplug to see if it was plugged in. It wasn't, so it couldn't be electrical unless it was a capacitor acting up. Puzzled and tired I went back to sleep.
Next day the crackling noise again caught my attention. I knocked the back of the monitor and the noise stopped, meaning that this probably came from a living creature. Determined to get to the bottom of the problem I picked the monitor up and flipped it onto it's face. I unscrewed the top back plate and saw that there are 3 large gaps where a bug or gecko could get in. I proceeded to unscrew the whole plastic backing and unclipped it. Gripping on to the inside of this backing was a yellow and black stinkbug which had worked its way in through one of these large holes. Bug was duly dispatched outdoors.
So what's the problem?
Any beetle or gecko can easy cause terminal damage to your monitor. Geckos love to leave wet droppings in out of the way places, and they can easily crawl in and do their business. There certainly won't be a good ending after switching on a monitor with a wet doodoo sliding down the electrical board. Equally beetles which can be very strong can damage the electronics especially when they are desperate to get free.
If you own a 21UX, you have this problem. If you have a different Cintiq, check the back for gaps. Remove the small back panel and look for gaps.
The solution is to place a piece of plastic on the outside to shield any entrance to these gaps. I've taped the top area where Wacom suggests one can place a pen, and also taped up the back area where the cable extrudes.
Whew. That really stressed me out. Glad the problem is sorted. Hope I can help a few others to relax.
To understand my stress, I live in South Africa and paid almost double the price for my 21UX due to custom duties and shipping.
[ PS - this may be a double post, but I can't locate my original post ]