Question about Polaroid PLA-4205 Television

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My tv starting to have a black picture until it warms up

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  • Polaroid Master
  • 1,208 Answers

You have bad capacitors in the signal board...see a tech to repair this. Thanks for asking and show a few hands of support!

Posted on Nov 11, 2010

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1 Answer

Partial picture frozen


Hi Robert
Possibly bad video memory.
LSI Chip failure until warms up.

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LCT TV picture blurry with black smudges until it warms up


No easy way short of monitoring with a scope and or voltmeter, based on age of set I would first "look" at all the filter caps in the main power supply--bad ones when they get hot can regain some function:


12_10_2012_3_40_01_pm.jpg12_10_2012_3_40_21_pm.jpg

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up


Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

Some masks either have a material or a defect causing the dome effect----Not likely to be anything else---a Pin amp problem will not usually act the way you describe but a shadow mask inside the picture tube will act exactly that way.

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1 Answer

TV picture is unstable until the TV warms up. This is taking longer and longer. Picture gets large, small, large, small... Quality is also lacking until it is warmed up. This is a Phillips 60'' Is this...


What model and brand is your television?
Is it a CRT type or DLP?
If picture is getting smaller then larger, and its a crt rear projection television sound like you have bad connections around the Flyback transformer and or horizontal circuits. This usually happens when a connection is made on the circuit board and the picture returns to normal especially during a cold start, but as the television warms up the connections on the board start to seperate and the problem starts occuring or it could be in the reverse process. Unstable at first then when tv gets warm it make better connections. All in all have a technician check the HV section of your deflection board.

Sep 29, 2009 | Televison & Video

1 Answer

Black lines in tv


Most likely there are electrolytic capacitors in the power supply, video path, and scan amplifiers that are starting to fail from age. This is common in many of these sets. In consideration of the age of the set, this may not be worth having it serviced.

Jerry G.


Sep 24, 2009 | Toshiba 51H93 51" Rear Projection HDTV

1 Answer

Picture won't come in clear until TV "warms up" for 15 minutes or more


Change the capacitors first per the instructions in the link below. Symptoms could be anything from high-pitched hum to no picture at all. On these defective models, I would start at the caps and work back. It won't hurt to replace them anyway.

http://www.fixya.com/support/r741402-polaroid_flm_373b_lcd_tv_black_screen

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Dark fuzzy picture when tv is first turned on


I am having a similar issue. Did you ever figure out the problem??

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Vertical hold problem


Maybe sync separator transistor is faulty

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