Question about Polaroid FLM-3701 Television

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No power on polaroid flm-3701 lcd tv. I have checked and power is getting to the board. All the capacitors on the power board look ok also. No leaking or swelling. There are 16 caps on the board, I was wondering which ones were the problematic ones? Didn't want to change them all, just the ones that go bad most frequent. Thanks.

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  • Master
  • 11,896 Answers

Out of 16 caps, 12 of them commonly go bad. The easiest way is to purchase an analog tester and at least test them all so you don't have to replace them all. Or just get a new board. But testing would be the easiest.

Posted on Aug 06, 2010

  • cbrawner1973 Aug 06, 2010

    Hey, thanks for the info. Some are 35v680uf, 25v680uf, 16v680uf, and 50v680uf. Would I be better off to get a higher voltage cap, so they wont blow again? If so how much higher should I go to be safe? Thanks.

  • Nate Stansfield
    Nate Stansfield Aug 07, 2010

    I would go with 35 or 50 for all of them. 30 would be safest.

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1 Answer

Diagram where fuse is in the polaroid flm-3701


There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light. Any capacitor that is swollen is bad.
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It looks like your power supply might not be providing enough current to get the LCD to power up. This LCD needs about 3 to 4 amps to work properly.

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There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V.
How ever, capacitors are more likely to fail on this television. The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light. Look for swelling in the tall capacitors E8 thru E17 on the left side of the board. Also E6, E7 and E22 can go bad, but they do not swell.
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Hi, my LCD Polaroid FLM-3701 went through a power outage and now doesn't get power any more. The power led doesn't show any light. I saw a capacitor repair kit available, and four 680 uF capac


The power supply fuse should be next the the ac input plug on the power supply. It should be a long cylinder type fuse, probably a T6.3AH/250V. You will want to replace those caps ASAP

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2 Answers

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There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light.
This P/S board is easy to access on this TV. There is a cover on the back of the TV. It is attached with 8 screws. Remove the cover. This will expose 2 boards. The power supply board is on the right. To remove the P/S board, first unplug the cables. There is an AC power power cord on the right and 4 data cables on the left. The board is held in with 4 screws. Remove the screws and the board will lift out. Any capacitor that is swollen is bad. The top of the capacitor will be curved upward. On the left side of the P/S board, there are 9 big caps labelled E8 thur E17. I would suggest replacing all of them. 6 are 680uF 35V and 3 are 680uF 25V. In the upper central region there are 3 small caps. These go bad, but they do not swell. These are E6, E7 and E22. They are all 22uF 50V. Replace all three. The attached photo shows before and after the caps have been replaced. The original caps were orange. The replacement caps are black.

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-0.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-1.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-3.jpg

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In the Polaroid FLH-3701, the fuse is located on the power supply board, next to the AC power connector. It is a small black cylinder. It is labelled F1. Value is 5 amp, 250 volts.
A fuse does not blow for no reason. Most commonly a fuse will fail because of a short someplace on the board. I have this same TV. The fuse blew. The reason was transistor Q6 had shorted. There are two identical paired transistors on the output side. Q6 and Q7. They are both Infineon 11N60C3 MOSFET transistors. Check those for a short. There may be a burnt smell.
More commonly, this TV will fail because of bad capacitors on the power supply board.

f0aca626-8c0e-4fbe-adec-105f02f6518b.jpg

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The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light.
This P/S board is easy to access on this TV. There is a plastic cover on the back of the TV. It is attached with 8 screws. Remove the cover. This will expose 2 boards. The power supply board is on the right. To remove the P/S board, first unplug the cables. There is an AC power power cord on the right and 4 data cables on the left. The board is held in with 4 screws. Remove the screws and the board will lift out. Any capacitor that is swollen is bad. The top of the capacitor will be curved upward. On the left side of the P/S board, there are 9 big caps labelled E8 thur E17. I would suggest replacing all of them. 6 are 680uF 35V and 3 are 680uF 25V. In the upper central region there are 3 small caps. These go bad, but they do not swell. These are E6, E7 and E22. They are all 22uF 50V. Replace all three.
polaroid-lcd-fizzled-blue-light-1onojclnad5aenzciu2mb45v-1-0.jpg

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