Question about ViewSonic Televison & Video
TV has worked very well for several years. Now I have sound but no video on any of the inputs. Any simple solution? I have heard that this is a common problem with this model. Serial number is PJL052002320 and it was manufactured in May of 2005.
Zdenko did an excellent job. Voltage regulators and
the capacitors on the main boards and in the power supplies are always
Some times you can narrow down the culprit buy purchasing a can of
freeze spray. Let the TV warm up and try freezing suspect components to
see if this causes a reaction. Thermal problems can often be found in
Of course, if you're not able or willing to replace components on the circuit boards, you can always replace the main board or power supply board after determining which is causing the problem. These parts should be available at your local Viewsonic service provider at a reasonable price.
Posted on Feb 14, 2008
Got it. I was the 'guest' who posted that I had the same problem. Not the CTRL board as I earlier thought. It boils down to the Y-SUS board (right hand side as you face the back of the display) In the upper-upper left hand quadrant you'll find a small capacitor labelled "C70".
This is the naughty one.
You can verify this by removing the back of the display, powering up and then with a small extended flame lighter, GENTLY warming C70. All it takes is about 2 to 3 seconds and the display will steady up just like always.
C70 is a surface mount capacitor, most likely 33uf at 25 volts. Haven't confirmed this yet. Will post again when I've affected the repair on my VPW505.................
BTW: This is not something you want to attempt unless you have experience with electronics. No.....really!
Posted on Dec 30, 2008
Right now there seems to be many people with the same TV problems with sony and HDMI cables. Most of the solutions are resetting the TV and sony product. Try leaving your TV unplugged for a hour to let it reset itself.
Posted on Feb 17, 2009
As with most LCD screens the two most problems that cause black screen are bad a solderjoint on the inverter board or bulging capcitors, the next problem would be most likely the power mosfets witch break down after time.
Posted on Jul 28, 2009
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