Seems like an internal short or bad connection because it blinked ...
344346
Stopped working at 9.5 months. Just quit. Seems like an internal short or bad connection because it blinked on and off... then off, for good. Won't turn on or charge.
2467907
It flickers often, sometimes like a stobe.  Mr. Adesso 5033-22 if you are reading this please help.
608817
I ordered this so that I could switch between my blu ray player and my computer on my computer monitor (Asus VE276Q). Most of the time it works great, switching when I power on one or the other. But then you have these incidents where the stupid thing flickers out as if the hdmi was unplugged.. All of this happens with me not even touching the unit. I'm not sure as to the reasoning it blacks out, I just know that when I'm in the middle of something on my computer, I want to break the damn thing.
963371
Light is a perfect fit and looks great but only worked for a few minutes before flickering and turning off, causing an error to display on the instrument panel. when pushing the brake pedal it works intermittently and then turns off again. Sending for a replacement and hoping, based on past reviews, that this was just a random defective unit and my replacement will solve the issue. Now if only it wasn't such a hassle to install! I will revise my review based on how replacement works.
4429347
Arrived onetime and works OK, blinks on and off sometimes.....
4871668
The thing likes to twitch out a little sometimes, like the battery isn't making a sturdy connection or something.
300502
Got a broken one - charger fast-blinks when battery is plugged indicating an error based on manual.
3923469
I also have the problem of random disconnects.  We had a techie come in and try to set it up for us, he got it working, but the thing still randomly boots us off.  It does the job, I guess, of giving us a connection, but it's got almost no reliability.  I hear it's got a lifetime warranty; good, we can return it.
2398013
Mine did not work and returned it. Caused video flicker. Looked like it may have been returned before. Obviously most of these work, but there is a chance you will get a dud. Not alone on this issue.
4552365
Was OK until a intermediate loose contact made the last 2 feet blink at times.  Make sure you check them carefully, plug them in and flex them everywhere to make sure they are constructed properly and will stay lit.
2373272
It appears flawed because at no time does the red light stop flashing. I want to send it back for  refund.
4777352
Can't  tell, but seems like it may have a loose connection (wire). Flashes on and off. Otherwise- great picture via tv or computer!
3560914
I bought this cable to connect my external monitor to my laptop which does not have a VGA port. Upon initial usage I realized there was a problem, the monitor seemed to randomly connect and disconnect causing a lot of flickering and black outs on both screens. I thought that my HDMI port was faulty but recently bought a new cable from StarTech and that one works fine.
1877618
I assume that it was the power switch having issues.  It would simply flicker.
I purchased on of these units a couple of years ago and it works just fine.
1715248
I'm really surprised this has such high reviews. It is cheap and it does work but that's about it. The display face is very far set into the gauge. This means the gauge has to be right in front of you to read it. I previously had my gauges by my hvac controls but this gauge was usless there so I had to move it to my a-pillar. Now it is OK. The second problem i found is that there seems to be a loose connection in my gauge internally. Every 20-30 seconds power is cut and the gauge blinks. It's quite annoying. I've ruled it to be internal to the device after some testing with it.
1669790
This product is great when it works.  It did work for a few days, and then it randomly started blinking where there was no motion.  It will turn on for a couple of minutes and then it turns off for a few seconds, only to turn right back on.  There is no movement in the end of the hallway that I have placed it, nor anywhere in the hallway.  I assume the sensor is bad.
1870260
I had to return this because it was doing the same thing my old one did -- once I put a battery in to charge, it would blink both red and green lights indicating an error