Entertainment Center: TVs, Stereos, VCRs and DVDs - Sony 32 inch trinitron, no picture

My father has a 32 inch trinitron tv model kv-32s40 made in 1998. The tv recently began experiencing problems with its picture. When you turn it on the standby light blinks and ther is sound but no picture. If you then turn the tv off and back on, the tv will then work fine for a while and then the screen will distort from the bottom up, agian leaving you with a blank screen. You can continue turning it on and off and will someimes briefly get a stripe of color, and the tv may sometimes agian work, but never for long periods of time.... The tv is now mine and i only have to pay the cost of repair... is it an easy or cheap fix? any help will be greatly appreciated.... thank you...

I think you are looking at a weak CRT. But there are couple of things you can try to confirm or repair. Email me at the site below.

Dakota

http://www.fixyourowntv.com

I hate to piggyback on another post but tonight ,y 32" Sony Trinitron is doing something very similar. We were watching it and it just shutoff. I turn it back on and the "standby" red light flashes, the sound comes on fine, channels change (I can only tell because the sound changes) and the screen is green and wavy. Then it shuts off (goes back to standby flashing). Any ideas? Thanks for all help. Sounds like this may be a problem that Sony may have with this model of TVs. Peace: e3 spamman

Hate to break a bunch of bubbles but the set is suffering from
lack of high voltage regulation. This usually occurs with a shorted
diode in the control circuits. No problem with the CRT or any such
thing. The set is fixable, can be fixed cheaply, and I can tell you
how.

Smokey

I hate to put out your fire Smokey but Sony's flash for a multitue of reasons. The least of which is no High Voltage. And P.S. Sony's have NEVER had problems with High Voltage Regulation. I have worked on Sony's in a Warranty Authorized Service Center since 1975.

Dakota
http://www.fixyourowntv.com

Smokey's explanation appears most plausible given the information listed.

Another source of information is the well-known sci.electronics.repair faq. Google it and read up on it before jumping to any conclusion. There's a wealth of unbiased and usable comments in there.


Hey Dakota, you should know better--yah can't rule out anything without looking at anything. there's always a first for everything. BTW, isn't it true the non-XBR TV's tend to be of inferior reliability, just like their non-ES audio equipment?

aaron

While we do see far more failures on non XBR models. Most people can't afford the XBR sets. Therefore Sony doesnt' sell near as many XBR Tv's. Closer examination reveals that power supply and horizontal circuits are almost identical. Using identical primary components. This means they suffer the same failures and use the same parts kits as their less expensive counterparts. The major differences tend to be in the CRT and video processing and extra features. If you have access to factory service manuals you will find as an example, that the 32HS500 uses the same manual as the 40XBR800 not to mention 17 other models. So are the XBR's better sets? Are they worth the extra money? It's the old Lexus/Toyota debate. I can tell you this. When they come into our shop for repair they are put on to the same list as the Samsung's. We look at them in order of date of entry. But we DO charge more for labor. Xbr owners tend to knit picky. They will bring in a dead set then whine about the convergence in the corner. Obviously the two are not related.

Dakota

After all this debate, there are still some dead sets out there. I received some tech support from Dakota and may try it this weekend. I am NOT an electrical engineer but am not sure I want to get inside the TV while its on and accidentally tap a big capacitor. It may be best to bring it to Dave's TV in Ashland, MA. Anyone have an idea of what they will charge to repair this problem? The biggest pain for me in all this is the damn set weighs a ton and I will need another hand in moving it out of the enter center, into a car, out of a car, into a shop and then vice versa home! Stupid thing is heavy AND has NO hand holds. peace: e3