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Cintiq 21ux shutting itself off when USB is plugged in

Wacom One, Cintiq and Cintiq Pro
Posts: 1
Joined: Mon 22. Feb 2021, 12:40

Re: Cintiq 21ux shutting itself off when USB is plugged in

Postby beezle23 » Mon 22. Feb 2021, 13:55

This thread is old but was incredible helpful and saved the day for me.
The small microswitch seems to be a weak point in this model.
I opened the back soldered/removed the broken microswitch and soldered in a new one with short cables. There are cheap options (10 pcs for 4 bucks) to buy a matching size but i had one (little too big) laying around so i just used the one with two cables and glued it on the back.
The tablet and new switch on the back are working flawlessly.
I took some pictures og the repair, maybe they help others to fix this!

Posts: 1
Joined: Fri 30. Jul 2021, 07:15

Re: Cintiq 21ux shutting itself off when USB is plugged in

Postby romani3 » Fri 30. Jul 2021, 07:36

I have encountered the same problem with my Cintiq 21ux. I figured it was the top power push button since it was the only thing that would trigger the shut-off/blink back on when I probed it. I found this post and safely removed the entire back casing to access the power button's small circuit chip. I located the pressure push-button switch on the circuit board that corresponds to the actual power button on the outside of the machine. The switch looks like a tiny 0.5 cm box with a circular button on top, and it has four pins soldered to the chip. In my case, two of the four pins of the button switch were burnt up the side of the tiny box. I had thought to repurpose one of the many other switch components in the machine (or buy a new one for $.25) and solder it back on. Instead, I gently removed the faulty switch while the machine was on, and it has since remained in the on position. All the power lights and standby lights still work, and it remains on as long as my computer is on (and survives restarts and shutdowns). You may need to re-install your drivers/software to re-sync your computer to the tablet monitor. Mine would de-sync every time the button shut it off over and over.

If I ever have to switch to a new computer, I may solder a new 4-pin push-button switch and see if it works just as well. I have a feeling that these older machines put too much stress on such a small component, and with frequent turning off and on, the mechanism just shorts out. A $.25 piece taking down a $2500 machine is quite a David and Goliath story, to say the least.
Hope this helps anyone still keeping these old machines alive. They are definitely worth holding onto if you can keep them in running order.

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