Question about RCA VR646HF VHS VCR

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Dead No Display.

Dear Techs, I have the above mentioned VCR, and I know where the Problem lies. I am an experienced tech. of 32 Yrs.I found 3 bad Caps, two Rectifier Diodes, No Problem with these parts, but I found 2 Shorted Zenner diodes, and I cannot make out the Volt& Wattage on these. And of course all this on the Power supply Board. Do you folks ever send out service literature on Elect.Equipment,? Thanks for your answer. Larry Helton (

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Three Problems, Please.

Dear brother Iam also a Technician like u I have also the same dvd player with me with missing IC104 in signal board under the lense mechanism,How ever the problem which u explaind in ur question I think it is problem from the lense,becouse I got so many DVD players (not mentioned player)for the explained symptoms and most of that when I change lense become good.
Dear brother I have a request to that to mail me the IC 104 number in follwing address.noushadkaruvally at

Posted on Feb 05, 2008

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SOURCE: RCA L26W11 26 in. HDTV

try pts or vance baldwin

Posted on Feb 12, 2008

  • 1 Answer

SOURCE: VCR portion not working found Damaged Components

Ya rca needs to recall all rca drc8335[tape decks]
I unpluged power to deck [jumper p/s to deck]
use a other vhs deck pluged in avi port

Posted on Aug 17, 2008

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SOURCE: Tv shut down and I found the HOT to be shorted.

this set is famous for defective flybacks. part number is 262342. replace the flyback

Posted on Jan 09, 2009

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On vcr power supplies usually first component to go is a capacitor, check if its blown, or test it if you have a meter capable, next check diodes and resistors, also check the resistors and diodes on all the boards( they may have blown if a cap has blown) If there was smoke or a smell its usually a resistor to look for. When you replace them replace them with a higher votage cap.. Example 15v 1000uF cap with a 25v -35v 1000uF cap( this is just to avoid the problem from happening again.

Posted on Feb 01, 2009

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My Acer LED monitor is black unresponsive and has an unchanging purple power button. What is causing this and how can I fix it?

We can not answer, what you can to, lacking skills or tools.
how, (get it fixed in shop?)
NO PC stated., just the same card I have GTX , that I am using right now.... as I type. MY PC is HOME MADE, ASUS based high end.
so step one is to what.?
1: try the GN246 on a known good working PC.
if that fails what do you know, in 5min work, ?
if that fails. the monitor or cable is bad.
cable is 20 times cheaper so.... bingo?

2: or take a known good monitor and test it on your unstated PC.
ok you did this, I'm talking to you and all others like you in same pickle jar. (stumped)

2 simple tests anyone can do with other PCs at home or friends that have PCs at home. (desktops)

YOU tried a 2nd good monitor on this unstated PC and it too is dead. GOT you on that. PC dead, end story on what end is dead
say it " my PC is dead." my desk top is dead. more clear.

I found my PC is dead, here is the list. NO PC stated ever.

1: I turn it on, and THE 3 FANS BLOW, SOUND heard ,seen and felt.
I always look first, gee this one is dead,.... dang.
dead fans are #1 if dead the PC overheats fast,
some super fast. in seconds fast. some take minutes,
varies by what you own, unstated.

  • PSU fan blows
  • CPU fan blows
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this is first. does yours....? all blow?
and all 3 not packed in lint , dirty. and running hot.?

how to the GTX1050 get there? you added it like mine,?
Did you plug it in, not using PC power discharging CAPS
rules first if yes, you blew up the card, called HOT PLUGGING.
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  • push power button, see fans turn 1 second sure, this discharges the power bus and cap.'s.(rails)
  • wait 15 minutes, then pull cables and cards, or insert them,
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for sure not any GTX made, do that. !!!!

I have powerful PSU to handle fast powerful graphic cards
500 watts up. do you , if not fail you will.
NO PC stated, no PSU power rating stated,
no answer really possible beyond black screens of *****.
(or purple)
no text, the LCD would infact tell you NO Sync, no signal or going to sleep, I bet you missed that, in fact that screen tells you that
even with the Video cable unplugged, turn on monitor.
a fact,

that purple tint smacks of GTX is overloaded
on line posts on PC are 99% lies, its just folks guessing endlessly and no trouble shooting skills nor training.
if wise google only (troubleshooting PC dead black screen)

Purple is outlier, but can happen but is very rare.

I bet your PC is overheating fast or is overloaded. or bad PSU
its power issue.
A PC can fail 3 ways on power.
PSU bad.
or something shorted, in side PC that overloads that PSU
or wrong PSU used, not enough watts for your GPU.

but at turn on all GPUs use small power. so

so all I can say is do the 3 fan checks
and try a 2nd PSU. or strip the system down to min
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2: remove all memory but 1 stick ,try all , 1 at a time.
3: make real sure GTX is in the X16 top slot !!!!
3a: all techs have a spare PCI-e low powered cheap spare GPU card in there kit (tool box) we then try this, for ending black screens.
( any old $10 card works here,no kidding, express card.)

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Thread Brake Failure Stop Safely

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Three Problems, Please.

Dear brother Iam also a Technician like u I have also the same dvd player with me with missing IC104 in signal board under the lense mechanism,How ever the problem which u explaind in ur question I think it is problem from the lense,becouse I got so many DVD players (not mentioned player)for the explained symptoms and most of that when I change lense become good.
Dear brother I have a request to that to mail me the IC 104 number in follwing address.noushadkaruvally at

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