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I have a old 52 inch rca projection tv ,model p52151wk,it has been a great tv, it made a popping sound and a burnt smell while i had the wii game playing and now the power lite will only blink and go right back off when you try to turn it on, what could be wrong

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  • Master
  • 647 Answers

The HV block is a common problem with these sets Part# 205064. Caution is required working in this area since high voltage is present.

Read below and decide if you want to tackle the problem yourself if so I’ll help along the way with what info I have. If not contact the nearest repair shop armed with the info below.

A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.
The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model – for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).
The only way to determine the real cause is :
By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour.

Posted on Oct 02, 2009

Testimonial: "thanks for the info, sounds like i may need to take it to a repairman, do you think this will cost a lot to fix it,thanks tim"

  • johnnydiode
    johnnydiode Oct 02, 2009

    If the picture was good b4 it went dead it's likely worth repair - Most shops should charge between $200-$350 and if you've never had the HV block replaced b4 it's definetly due (I've replaced 100's).

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