trader_4
Mon, 26
Dec 2016 14:56:40 GMT in alt.home.repair, wrote:

On Friday, December 23, 2016 at 11:29:16 PM UTC-5,
wrote:
On Fri, 23 Dec 2016 20:12:44 -0800 (PST), Uncle Monster
wrote:


The old "Instant On" tube type TV sets used a lot of power on
standby to
keep the CRT and vacuum tube filaments half powered so the set
would come on more or less instantly. My LED TV might draw a few
milliamps when it's off to keep the IR remote control circuitry
active so it would be silly to unplug or kill the power to it.
?(€¢?€¢)?

[8~{} Uncle Instant Monster

"Smart" TVs will draw more because there is a processor running
all the time and even loafing along, it is still going to draw
something. Cranked up it can stream and process 1080 HD content
so that makes it a pretty powerful PC.

I would suspect that any digital TV today, even the most basic,
has multiple CPUs doing a variety of functions.

ROFL. You'd be surprised to find out that's typically not the case. A
single CPU can do the tasks required quite well. Especially when it's
a dedicated task. I've taken quite a few of the little *******s apart
because they tend to be unreliable for long term usage. They do
better if you turn it on and just leave it on than they do if you
turn them off (sleep mode) and wake them only to repeat the cycle
every single day.

If you're curious enough, try to locate a suitable mainboard for a
model tv set you own and you can usually find pics of the board
detailing every component on it. You'll find it has a single CPU that
may/may not have the transformers on it (primary transformer, baby
transformer for sleep mode and firing of a relay when you wake it;
which energizes the primary transformer). Oh, and some of the relays
are actually a tiny chip! instead of a small piece of plastic. If
that chip gets fuxored, it's difficult to find a suitable
replacement. I've had mixxed results soldering jumper leads from them
onto a real relay. Sometimes this works like a charm and the dead tv
is good to go, other times, it doesn't help. In those cases, I've had
to resort to replacing a board. That is, if the cost of the board is
still justified based on the age and size of the tv. Sometimes, it's
not worth doing. These new tvs are what I call 'super disposable'
grade.

If it doesn't, they'll be on a small board by themselves and some
filtering circuitry. You'll also find a seperate in most cases audio
amplifier board, and perhaps another board or two for switches and
ports. Most of the boards aren't very big. Very little physical space
inside the tv is spent on electronics. Most of it's the screen itself
and whatever backlight technology it's using.

You might also be shocked to find out that many times, that more
expensive tv you bought sitting beside the brand you've never heard
of that was a couple of c-notes cheaper have some interesting things
in common. Under the hood, they often share the same components;
right down to the ****ing model/part# on the board itself. You wind
up paying for the name on the case.

Like you sometimes would if you bought a Cobra radio over a Uniden
radio that happened to have the same features, but, looked different
outside. If you opened them, you'd find Uniden stamped on the
identical boards inside the chassis; only you paid more for the Cobra
'version'. Sometimes, a lot more.

Even in a PC, the display card or display processor on the MB was
one of the highest consumers of power.

The PC is responsible and capable of doing far more than the hardware
in your TV set could dream of. As a result, it's electrical power
demands will be higher. You aren't comparing this fairly. The CPU in
your smart tv has a small job to perform, compared to the CPU in your
desktop.


Digital TV would be similar.

Primarily the screen, backlight source AND audio amplifier board are
the power hungry components when the tv is running. But, in this
case, power hungry isn't really that many watts. One of my LED based
tvs consumes roughly 25watts when it's running. It doesn't consume a
measurable difference in power when watching bluray hdmi, dvd hdmi or
1080p HD vs crappy cable channels that aren't HD anything.

So, I wouldn't be surprised that there isn't much difference in
power with a smart PC.

Umm... There's a considerable amount of difference. You're comparing
a dedicated device with limited hardware specifically for that
purpose (the tv) to something else that can be configured to do
thousands of different things and has oodles more processor power as
well as storage space (which your tv itself isn't likely to be using
a mechanical hard disk, if it has what you'd call a hard disk at all)

Your smart tv isn't a big badass computer like your desktop. Not even
in the same ballpark. A smart phone isn't even comparable to todays
typical desktop in terms of configurability, processing power, and as
a result, power consumption. The smart tv and smart phone use very
little compared to your typical actual computer.

Some spec sheets would perhaps have the answers.

Yep. They do. You should consult with some before making such a
comparison again.




--
Sarcasm, because beating the living **** out of deserving people is
illegal.