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VCR won't turn on after brownout

We experienced a brownout last week, during which we hurried around
the house and unplugged everything sensitive.

Afterward, everything came back up fine except for a Panasonic PV-
D4744S DVD/VCR combo. It refuses to turn on. I opened up the case to
see if there was any obvious damage, but everything looks fine, even
the 125V/3A fuse appears intact. Anyone have any ideas what I can do
besides replacing the unit? It's only a couple of years old, it
wasn't terribly expensive but it's a shame to have to throw it out
already.

Thanks
Ken
 
M

Meat Plow

Jan 1, 1970
0
We experienced a brownout last week, during which we hurried around
the house and unplugged everything sensitive.

Afterward, everything came back up fine except for a Panasonic PV-
D4744S DVD/VCR combo. It refuses to turn on. I opened up the case to
see if there was any obvious damage, but everything looks fine, even
the 125V/3A fuse appears intact. Anyone have any ideas what I can do
besides replacing the unit? It's only a couple of years old, it
wasn't terribly expensive but it's a shame to have to throw it out
already.

Thanks
Ken

Have you ever fixed a switch mode power supply? Have you every fixed any
electronic component or device?

--
#1 Offishul Ruiner of Usenet, March 2007
#1 Usenet Asshole, March 2007
#1 Bartlo Pset, March 13-24 2007
#10 Most hated Usenetizen of all time
Pierre Salinger Memorial Hook, Line & Sinker, June 2004
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S

Sofie

Jan 1, 1970
0
Ken:
"everything looks fine" ..... bad parts don't always burn up and look
bad... they need to be tested and replaced by a tech who has the correct
test equipment and know how to troubleshoot...
The symptoms you reported are common, especially after power outages and
storms... and either are easy and economical to repair or sometimes not
worth fixing but the only way to know is to take it to a repair shop.... my
shop does these types of repairs all the time and in about 8 out of 10 times
the repair is economically feasible.
So, don't toss it until a tech looks at it... since knowledge, time and
parts are not free there may be a charge for an estimate without a follow-up
repair... or if you have it repaired, any diagnostic deposit you may be
charged would apply to the repair invoice. Check with the local repair
shops in your area.
Daniel Sofie
Electronics Supply & Repair
- - - - - - -
 
Ken:
"everything looks fine" ..... bad parts don't always burn up and look
bad... they need to be tested and replaced by a tech who has the correct
test equipment and know how to troubleshoot...
The symptoms you reported are common, especially after power outages and
storms... and either are easy and economical to repair or sometimes not
worth fixing but the only way to know is to take it to a repair shop.... my
shop does these types of repairs all the time and in about 8 out of 10 times
the repair is economically feasible.
So, don't toss it until a tech looks at it... since knowledge, time and
parts are not free there may be a charge for an estimate without a follow-up
repair... or if you have it repaired, any diagnostic deposit you may be
charged would apply to the repair invoice. Check with the local repair
shops in your area.
Daniel Sofie
Electronics Supply & Repair
- - - - - - -

Thanks for the advice Daniel.

-Ken
 
B

b

Jan 1, 1970
0
if you know what you're doing, change the low volt capacitors in the
power supply as these are the probable cause of what you describe -
very common.
-B
 
M

Meat Plow

Jan 1, 1970
0
if you know what you're doing, change the low volt capacitors in the
power supply as these are the probable cause of what you describe -
very common.
-B

Common when the unit is exposed to a brownout?

--
#1 Offishul Ruiner of Usenet, March 2007
#1 Usenet Asshole, March 2007
#1 Bartlo Pset, March 13-24 2007
#10 Most hated Usenetizen of all time
Pierre Salinger Memorial Hook, Line & Sinker, June 2004
COOSN-266-06-25794
 
N

nipperchipper

Jan 1, 1970
0
I'd go check that zener diode in the power supply that always shorts and the
IC protector attached to it
 
H

Homer J Simpson

Jan 1, 1970
0
Afterward, everything came back up fine except for a Panasonic PV-
D4744S DVD/VCR combo. It refuses to turn on. I opened up the case to
see if there was any obvious damage, but everything looks fine, even
the 125V/3A fuse appears intact. Anyone have any ideas what I can do
besides replacing the unit? It's only a couple of years old, it
wasn't terribly expensive but it's a shame to have to throw it out
already.

Pull the power cord and leave it off for 24 hours. That won't cost anything
and sometimes works.
 
J

James Sweet

Jan 1, 1970
0
We experienced a brownout last week, during which we hurried around
the house and unplugged everything sensitive.

Afterward, everything came back up fine except for a Panasonic PV-
D4744S DVD/VCR combo. It refuses to turn on. I opened up the case to
see if there was any obvious damage, but everything looks fine, even
the 125V/3A fuse appears intact. Anyone have any ideas what I can do
besides replacing the unit? It's only a couple of years old, it
wasn't terribly expensive but it's a shame to have to throw it out
already.

Thanks
Ken


If you have a multimeter, soldering iron, and the inclination to learn a
few things you can probably fix this, but you'll have to get in and take
some measurements. Bad parts usually look just fine.
 
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