Electronics Forum / Repair / June 2008

I have an old Viewsonic 420E UPS.  New battery.  Tests and works fine.
Lately, I've heard a light "clicking" - usually when the harddrive of the
computer is accessed.  I was worried that it was the drive  but eventually,
I traced it back to the UPS located a few inches below the ...

I have a JVC HR-S3910U S-VHS machine which had a problem accepting
certain tapes.  The eject mechanism would make a funny squeeling noise
i.e. Similar to the sound of wiping a cloth on glass.
Tried using WD-40 to correct the problem, but now the machine does not

I am looking for a non-soldering way of attaching flexible wire to a
LED leg - I know I could wrap it, but I think it time it might come
loose or the connection might not be the greatest - has anyone come
out with a product that will work so if I wanted to change the LED, it

for what ever reason, I have been looking for a long time now
to buy lets say 5 or more, 3SK291 transistors that are Toshiba made.
 this is a dual gate UHF Fet transistor..
  Can any one supply a link to a supplier that has this transistor

Recording at LP speed and replaying leads to a failure of lip sync.
What to look for if indeed a fault ?
--
Diverse Devices, Southampton, England

My wife dropped her portable radio in coke.  I took it apart and
cleaned it and it seems to work fine except the LCD Display is dim and
erratic.  It connects to the PCB lands by pressure only and pressing
improves the display somewhat.  I don't understand how this type of

I have a CRT type SONY 27 inch TV Model KV27T530.  It's between 10 to
15 years old and still shows a great sharp picture in excellent color.
I have Cable TV for the basic channels (2 to 13) plus the first tier
of extra channels.  A month or so ago it could show only the first

I'm bumping my post since I think I worded it wrong in the subject.  I
got the above model Samsung PCN5425R it turns on and off all the
time.. in a cycle.  I've replaced the STKs and checked all the
resistors on the convergous board.  I've also checked all the pico

it will not turn on at all(nor talk/batt low  diodes)  even with
new battery...
Here is its schematic
http://www.geocities.com/anglomont/nb3908.jpg

My laptop's display backlight has been fading since I bought it a few
years ago, so I think it's about time I exchange the CCFL backlight with
a new one. The LCD in question is a Samsung LTN152W6-L01.
I've been trying to follow the instructions at sites such as

I came across an old PC keyboard with a built in calculator (Focus
3001).  The calculator appears to work but a lot of the segments on the
display don't.
Is it likely that the chambers with the liquid crystal stuff leaked or

I've been an active participant here for around a decade, and owe much
of what I know about repairing electronics from the helpful techs who
have hung out here donating their time to share tips and information
with others. Over that time, I've witnessed the steady and unfortunate ...

I found such good help here on the subject of my DSL line speed I hope you
don't mind if I come back with this semi OT follow up.
I currently don't know if there is, or ever was anything wrong with my DSL
speed.  I would be interested to hear if you think there is something wrong

I have about 40 C2016 batteries kicking around.  I want to store them,
but someone told me if they are touching each other in a bag they
might lose the charge...what is the best method (besides selling them
on Ebay to get rid of them!)

We have an elderly JVC 27-inch tube-type television, Model AV-27BMS  (I
think).  It's been a good TV for 13 years now (manufacturing date is January
1995).  In the last few months, however, it has developed an annoying
problem.  The picture periodically shrinks down horizontally ...