Televison & Video Logo

Question about Proscan PS27125 27" TV

1 Answer

Intermittent loss of picture

My Proscan TV works fine right after I turn it on, but within about five minutes the picture disappears and is replaced by a horizontal white line acrosss the middle of the screen. The sound is unaffected. within a few minutes the picture may, (or may not!), reappear. This sequence of events is randomly repeated as long as the power is on. I love the set, but can't afford a repair shop's bill. I am good with tools and such, know a bit of electronics, and am perfectly willing to attempt any advanced repair procedure; it's either that or the TV goes unused and uselessly taking up valuable space in my garage. Thanks for any helpful advice.

Posted by Michael Anthony on

Ad

1 Answer

Bill Heronemus

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 308 Answers

You'll have to locate the vertical output IC which should be mounted onto a heatsink, then take out a good magnifier under the printed circuit board and examine the solder connections on the pins of that IC and resolder the ones that are cracked.

Posted on Mar 12, 2007

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

I replaced the mainboard on my proscan TV, but the picture still won't show, what's wrong?

Hello Anonymous,

By putting your number (plded4079-sm) on eBay... immediately produced no "USA" power boards...

Likewise an AMAZON search failed.

Which means most FIXYA volunteers are going to
have some difficulty ... The number of your PROSCAN are the only thing that DIFFERENTIATES your set from our similar USA (domestic) models...

We just call them "power boards"... and they are popular
because the new industry standard for capacitors is
"cheap & cheesy"...

The bright-side = there is a bounty of "SPARES" on eBay...
and their reliability (& reputation) is NOT much worse...

(I'm just saying) Shop around...!!

Cautionary statements:
You MUST VERIFY your own circuit pack numbers
(stare & compare)...

Get and use ESD (electro-static Discharge) wrist straps while handling EVERY CIRCUIT BOARD you care about.
(see below)

Take lots of pictures going in... Put EVERY wire
EXACTLY back from whence it came...
and... FORCE NOTHING.

PS50B450B1WXXU = UK
PN50C450B1DXZA = USA (wrong)

Failed searches
http://www.shopjimmy.com/proscan/plded4079-sm

http://www.searspartsdirect.com/model/search.html?q=plded4079-sm

ESD wrist strap
Amazon com Rosewill ESD Anti Static Wrist Strap Components RTK 002 Black...

Carnac the Magnificent
0helpful
1answer

TV works fine for a while, then the picture disappears.

I would just replace the TV, the parts are not going to be made to repair this. The set is just to old.
0helpful
1answer

TV Picture problems

My samsung did the same thing right before my color wheel went out. Can't be sure but that is what was wrong with mine. hope this helps.
0helpful
1answer

Vertical line picture

problem is caused by the loss of horizontal deflection signal. It is quite surprising that the entire unit is still working, since usually, a loss of H-Out will disable the entire set. Problem can be as simple as loose solder connection to a more complicated defective horizontal circuit. I would suggest havint it checked by a professional TV tech.
0helpful
2answers

No Audio, picture fine

this is a very common problem just unplug tv for 5 minutes it
should fix it . simple fix most of the time with rca and proscan.
If that does not do it go into menu scroll down to audio and then press on .


thanks doctor video leading edge electronics
0helpful
1answer

Picture loss!

It sounds like cold solder joints on the vertical IC chip. Not a major deal. The entire board should be looked over for other joints becoming cold.
0helpful
4answers

Tv: why do I only get sound when I turn the TV on?

Exactly i do no the problem in the video section.
0helpful
1answer

Sony KP-51HW40 51 in. Rear Projection turns blue

Hello......
First reduse the G2 voltage for the blue c.r.t,and watch if the unit works for longer period (offcource blue colour will be not present).After reducing G2 voltage to blue c.r.t still behaves the same than c.r.t is faulty and you have to replace.
Pls count the red led blinking when it goes off,incase it goes to std by mode.
Gopali
2helpful
1answer

Degrading picture with my Dwin projector

the colorwheel is going bad and needs replacing. the colorwheel needs to spin fast enough to sync up with the dmd chip. if it cannot, the pic goes bad then off. the flashing is the colorwheel trying to catch up.
0helpful
1answer

Loose Picture (Goes completely Black)

Nothing special about that board as I cant seem to find that # but If my memory serves me correctly it sounds like a crt board and its a simple soldering job on the crt socket?? Altough Im not there to see the set still 550.00 seems like an awfull lot to repair a set even if they have to replace the entire chassis. I think you should cal rca and take it to an authorized RCA repair center and if the shop you took it to was an rca authorized center I would also report that to them(RCA). Good Luck
Not finding what you are looking for?

107 views

Ask a Question

Usually answered in minutes!

Top Proscan Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76835 Answers

tom walsh

Level 2 Expert

228 Answers

Cindy Wells

Level 3 Expert

6450 Answers

Are you a Proscan Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...