Capacitor problems with LCD's

[sghill99]

Hi,

I was wondering if the newer LCD monitors out there, 2009, 2010 era are being built with the same radial aluminum capacitors as the ones built in 2006, 2007? Just wondering if they are having the same problems with capacitor failure.

Thanks!

[Rtech]

Re: Capacitor problems with LCD's

The standard Power Supply ones etc, will continue to be used,and of course will continue to fail over time.The interesting part is what effect the LED monitors will have on the timescale,if any.

[sghill99]

Re: Capacitor problems with LCD's

So the manufacturers aren't doing anything about the capacitor problem? It's a necessary evil that must be used in all of the power supplies? I was wondering if there's something on the horizon that might replace the aluminum radial capacitors.

I guess it's in the manufacturers best interests to continue to use them as they need to continue to sell monitors.

The LED's don't use the same power supply?

[Rtech]

Re: Capacitor problems with LCD's

We have only seen one on here, and that does not tell much at the moment.

[PlainBill]

Re: Capacitor problems with LCD's

So the manufacturers aren't doing anything about the capacitor problem? It's a necessary evil that must be used in all of the power supplies? I was wondering if there's something on the horizon that might replace the aluminum radial capacitors.

I guess it's in the manufacturers best interests to continue to use them as they need to continue to sell monitors.

The LED's don't use the same power supply?

Failing caps are not a necessary evil. There are several brands / series that are known to be reliable. Note that failing caps are not new. Back in the '70's I had a 5 year old color TV with obvious '60 Hz ripple'. Currently there are two technologies available that would reduce or eliminate the problem. Panasonic, Sanyo, UCC, etc. are already producing superior caps. Polymer caps are another (more expensive) solution.

As long as the consumer is more interested in price or 'gee whiz' features than in durability the manufacturers have little incentive to put an extra $2.00 into better parts.

Monitors with LED backlights will still use the same SMPS design, the only difference will be the lack of an inverter.

PlainBill

[severach]

Re: Capacitor problems with LCD's

LED panels promise less heat. Less heat means cheap caps last longer. If the caps last longer then cheaper ones can be used.

[smason]

Re: Capacitor problems with LCD's

I dunno. I don't think LEDs are that much cooler than CCFLs, a bit maybe. LEDs are usually cool, but in today's new applications where they're a major light source, not just an indicator, they run much hotter than they used to.
'course thats just my speculation, I don't have any LED stuff here yet.

They'll definitely less complex as there are no high voltage inverters required.
I agree with Bill, the SMPS is here to stay, and will continue to eat caps, especially as the monitor/TV case designs get thinner.

I have a Panasonic Plasma as my main TV, it's really thin. The other day I was complaining about how much the sound sucks, then I realized there's no place to put any kind of decent speaker in it, and they're in the back.

Conversely, all of the AV receivers are huge, and I haven't found one that will live with my Sat receiver without taking over the living room.

[retiredcaps]

Re: Capacitor problems with LCD's

Conversely, all of the AV receivers are huge, and I haven't found one that will live with my Sat receiver without taking over the living room.

Marantz NR1501.

Dimensions W x H x D (Inchs) 17-3/8" x 4-3/16" x 14-1/2" and 19 pounds

http://us.marantz.com/us/Products/Pa...oductId=NR1501

I don't have one, but have admired the more "musical" sounding receivers brands like Marantz, H/K, NAD.

[smason]

Re: Capacitor problems with LCD's

Marantz NR1501.

Dimensions W x H x D (Inchs) 17-3/8" x 4-3/16" x 14-1/2" and 19 pounds

http://us.marantz.com/us/Products/Pa...oductId=NR1501

I don't have one, but have admired the more "musical" sounding receivers brands like Marantz, H/K, NAD.

That's more like it! Thanks for the link.

[alexanna]

Re: Capacitor problems with LCD's

Failing caps are not a necessary evil. There are several brands / series that are known to be reliable. Note that failing caps are not new. Back in the '70's I had a 5 year old color TV with obvious '60 Hz ripple'. Currently there are two technologies available that would reduce or eliminate the problem. Panasonic, Sanyo, UCC, etc. are already producing superior caps. Polymer caps are another (more expensive) solution.

As long as the consumer is more interested in price or 'gee whiz' features than in durability the manufacturers have little incentive to put an extra $2.00 into better parts.

PlainBill

Think about failing cap's, if the manufactures didn't have a problem with them failing, we would be replacing inverter transformers and small I.C's and backlights.
I get a big grin whenever I open up a monitor up and see all those domed capacitors.

[Scenic]

Re: Capacitor problems with LCD's

^same here.
it's a PITA if something really expensive or complicated is wrong..
like my Samsung 223BW..
no bad caps (replaced them anyways), all voltages there and stable, all voltage regulators on the LCD controller board check fine and so do all the diodes, but it's still dead as a rock..

oh how i wish that it just had bad caps as most of the other samsungs i've fixed
dunno what to do with it. can't even use the panel for another 22" monitor because the 223BW is advertised as 22", but the panel is actually just a 21.6", so you would end up seeing the metal frame on a "real" 22" monitor... craaaap -.-

[PlainBill]

Re: Capacitor problems with LCD's

Think about failing cap's, if the manufactures didn't have a problem with them failing, we would be replacing inverter transformers and small I.C's and backlights.
I get a big grin whenever I open up a monitor up and see all those domed capacitors.

It does bring up an interesting dichotomy. I can understand the typical consumer complaining because their $300 17" LCD monitor died after 3 years. I'm sure their pain will be lessened by the fact they can buy a 23" wide screen replacement for under $150.

It is a little less easy to understand someone who repairs monitors for income complaining how easy it is to fix most of them.

PlainBill

[alexanna]

Re: Capacitor problems with LCD's

It does bring up an interesting dichotomy.PlainBill

I always like to read your posts I always learn a bunch of big new words.