Electronics Forum / Repair / March 2004

I have a problem with my Viewsonic G810 21 inch monitor.
When I go into my BIOS, after about 3 seconds the HV shuts off and will not
come back on. I also tried pushing pause during bootup to see if it was
happening in JUST BIOS or in DOS resolution and it did the same thing.

I wonder if anyone can help me, i just bought a kenwood NV600 from
ebay, it turns out the the cd stops playing after a few seconds -
sometimes 30 secs and displays the "no disk" error on the screen. If i
eject the cd and reinsert it plays for another 30 seconds or so. I

I am looking for a source/sources for purchasing some liquid crystal
polymers.  I have an old 1984 Corvette that the display has died.  It
consist of 3 seperate displays that are two pieces of glass etched with
condictive patterns and sandwiched together with a small cavity that ...

I have a RCA Colortrak Television that has worked for years but is
recently showning its age.
The television will work fine for 15 minutes and then automatically
turn itself off. To turn it back on the power button on the television

Hello people.
I need the schematic or service manual for a LG 20CP52A TV.
I have a problem where the volume "jumps" when I set it via remote control.
E.g. Volume is at 20, I press VOL+ and the volume setting "jumps" to 25 or 30.

Does anyone have a schematic drawing of a Zenith 20" TV model
SMS1935S?  I am looking for the schematic of only the audio section.
I am confused by the part numbers stamped on the two transistors in
that section.  They have the same part number, but each one checks out

A customer brought in an IBM model 6552-23N 21" computer monitor
that slowly went dim (over about 3 minutes). I'm guessing that the
heater or heater control has gone south.
Would anyone have the pinouts of the back of the tube so

I inherited my grandfather's old record player... looks about 70s or
60s (age).
It seems to run perfectly, other than the fact that no sound comes out
of the RCA-type output.

Does anybody has this schematic diagram for KV32FS13 tv?
It is not receiving any command from the Remote Control (that is known
to be working fine).
Any help is appreciated.

So I took in this Sony that the owner said had very quiet sound, didn't
bother to try it out, MPX module had leaky smelly caps so I replaced it,
resoldered the IF module, still no sound, did more resoldering, still no
sound, then finally I decided to poke around in the menu since I ...

I found a Gateway EV700 monitor (the Mag version) in the trash the other day
and I'm having some problems with it.  I used it for about 20 minutes and it
suddenly just shut off.. the power light stays on but no picture.  I turned
it off and back on and the power light will come on - ...

The TV works great, except that I cannot re-program the channels above #13.
Setup in the Menu isn't available. Haven't seen this before. Will appreciate
any help.
Thanks

I have been given a Harman Kardon amplifier to repair, model HK620.
The symptom is that there is no audio output on either channel from any
of the inputs.  The amplifier didn't go faulty in operation.  The owner
got it out, tried it and found that it no longer works.

Hi all-  Everything in this system works good except for the CD player
section: I keep getting the following message and it won't eject CD's
already loaded:  Error- CD 20.  Does anyone know for sure what this
code means ?  Model # is CD-BA3100.  Thanks !

need to know what is d808 in powersupplygoes to gate of q801 and ground prob
a zener but dont know what volt. anyone w/ a schematic please help
thanks
mike