Okay, what the hell has so far managed to kill *3* LCD HDTVs?

I got, as a bonus, an LCD HDTV. It’s a 37" 720P model - not what I would have picked, but free is free.

So, I get this thing in late September or so, connect it to my UPS for power, and connect it via VGA to my Media Center PC. Everything works just fine.

Eventually, I decide to see if I can get some unencrypted QAM channels and plug our basic cable into a splitter and run it from the wall to the two tuner cards on the PC and the one CATV in on the back of the TV.

Some time passes - maybe a week, maybe just a few days. I turn the TV off, and that’s it. It won’t come back on. You’ve got the red LED on the front of the unit that glows happily, and when I press the power button the LED turns green. That’s it. No backlighting on the screen, no audio, no nothing.

I go through Viewsonic’s ARA process. I can honestly say that I’ve never dealt with a bigger bunch of backward-ass incompetents in my life. I deal with vendors who I absolutely KNOW that, before I call them, I will be screaming at them by the end of the phone call - and I would far prefer them to the excruciating experience that is Viewsonic “Customer Service”. (Here’s a hint - if you follow the options for “warranty” you’ll literally be on hold for hours - if you just press “1” for English and let it sit, you’ll get to someone in under 20 minutes).

And I get the second TV. I plug it up to the VGA, the CATV, and power. It runs for about fifteen minutes before my daughter, at a lovely 15 months old, presses the power button.

Yup. Won’t turn back on.

Another 10 or so hours on the phone (I shit you not - talk to one of those guys and ask who their manager is. They can give you a title, but not a name. Ask who their manager’s boss is and they can’t even give you a title) I get a third TV.

I pretty much know what’s going to happen. I’ve got a pretty well-formulated theory. I have an electrician friend check the outlet and everything seems fine. I plug it into the AC power (not the UPS!) and VGA on Friday night. It works fine. Sunday afternoon I decide I’d like to see some NFL in glorious Hi-Def. And it works fine. I know the TV is a dead man, but, well, what the hell good is a TV that you can’t plug in?

Then bedtime, when the little woman comes into the bedroom and tells me that the remote won’t turn the TV off, so she thought I’d probably want to look at it. At this point, I should probably explain that one of the two other symptoms I’d noticed was that pre-mortem the system would start responding to the remote control very poorly. You could change inputs or channels or turn it off, but you’d have to hit the button a bunch of times for it to notice. So, I manage to turn the thing off with the remote.

We all know what happened next.

TV number four is currently on the way from Dipshit Central (or, as it’s saved in my cell phone, “Viewsonic pigfuckers”). I’m moving in two weeks, so once I get the damned thing I have no intention of plugging it into anything until I move. So, it’s pretty likely that the problem will vanish once I move.

But what has been happening to these TVs? I’ve checked for voltage on the cable, and it’s not like theres anything my meter can detect. It’s not like there’s lightning shooting down the power lines, because I’ve got a PC, a receiver, a Wii, and there used to be a CRT on that outlet (actually there is now, too). None of that stuff has ever died. I have lived here for 3 years, and had a couple cable boxes connected to both the power and CATV and no deaths. There’s a TV in the bedroom, connected to the same cable circuit, and it’s fine.

Any of the brilliant minds on the SDMB have any idea?

-Joe

My immediate theory is that the TVs weren’t dead – I’d suspect the Media Center PC for somehow screwing with the controls. However, you said you used VGA and not HDMI or DVI. VGA, as far as I know, does not support any sort of control signals.

Well, FWIW, I’ve gone and completely disconnected everything from one, let it sit for a few days. Then I try to start it up with nothing but power connected, and I don’t even get a blue screen.

-Joe

Not even a signal? Mine will show a nice black screen if nothing is connected to the TV.

Well, this one will show blue if it’s on an input where there’s no signal.

These don’t even do that. The only way you know it’s even plugged into power is because of the LED on the front. The only way you know you’ve pressed the button is because the LED changes color.

If you look closely at your ‘nice black screen’ you’ll probably see that it’s actually a very dark grey because of a little lighting because the screen is on, and if you turn the TV off you’ll see it looking a darker back, because it’s actually OFF. Mine doesn’t do that.

-Joe

Have you had any problems at all before you connected the PC into the system, or only after you introduced the PC to the equation?

One thing you could try (if you still have either of the dead TVs) is to either put the remote right up to the IR sensor and cup your hands around it, Or (assuming you tried the controls on the TV, you did, right?) try putting your hand over the IR sensor and then using the TV controls. Some equipment will cease to function if it senses an IR in the room. A common cause is a remote stuck in a cushion. A button get’s stuck down, but the way the remote is stuck, it’s still spewing IR out all over the room.

I REALLY doubt this is the case, but it’s worth a try.

Actually, we STARTED connected to the PC. That’s where I got the 3 or so weeks of functional time. It’s only going to hell once I put the CATV on.

-Joe

Brain-dead question, but have you tried switching it off (and then back on :D) at the wall?

What happens if you simply hook it up to a DVD player?

Once it’s blown, absolutely NOTHING happens except for the LED changing color when you turn it on or off.

-Joe

but is the LED clearer than on ‘normal’ tvs?

Did anyone else at your work get the same TV for a bonus? If so, are they having he same problem? Regardless, any chance you can explain the situation to whomever purchased the TVs for your company and try for a full return with the cash as the bonus instead? If I worked for a company and arranged to purchase 1 or more TVs for employees, I’d be pretty pissed to find out there’s a problem with them.

I tell you, man, it’s like sitting in front of a real LED. It’s like being there

Excellent question! There were no others given out to other employees, but the reason I was given this one was it was an extra from a project. Thirteen others were installed in a surveillance video wall at a casino. All of them work just fine, and have been up and running since shortly before I got my first of the doomed TVs. They’ve been running basically 24/7 for…at least three months now. Last time I was there I said, “eh, what the hell” and turned off a couple of them for a second. They came right back on…but they’re connected to a VGA source and only a VGA source.

The 13th one is actually connected to a satellite feed rather than cable, and it’s about 150 miles from my house, so whatever issues are going on are probably not going to spread quite that far.

-Joe

And now for an update on this super-exciting thread!

I got another replacement TV from Viewsonic (#4 total, for those keeping track) and, since I was going to move two weeks later, I figured I’d wait.

So, I move 5 miles. Plug in the TV. Turn off the TV.

Yup. Same damned thing. I’d actually gotten to the point where I was convinced it was the cable, but now I’m thinking they’re just sending me crap replacements from a crappy model.

So, I’m now supposedly getting a different model. But I still don’t see any really reasonable explanations.

Anyone?

-Joe

It sounds like an over voltage input at some point, or a bad model. You may get a spike in the power line or across the cable input. Are all items properly grounded. Is your cable through a box and then the tv or straight connected to the tv? The outside of the cable needs to be grounded to a good ground. Don’t connect the tv until you ground the cable. You want to be sure you don’t have an electrical potential on the ground of the cable.

I had to install a surge protector on ma’s main breaker box to stop the random damage there.