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My 5.1 channel digital amplifier wont turn on it just turned off and was hotter then usual

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You need a voltmeter for this and would have to check for DC on the speaker output terminals. Once you attempt to turn the unit on (before it quickly goes into shutdown), look for any DC voltage over
0.3V across any of the 5 outputs. If so, the digital amp IC is shorted and would require replacement.

Most common reason for failure of a digital amplifier IC is a speaker impedance change or wiring problem. You CANNOT connect any of the grounds together for any reason as the amplifers have floating grounds in respect to chassis ground and each other. The amp circuits often will tolerate this for a short while before eventually shorting out.

Your description of excess heat coming from the unit may also indicate a fan problem. Most brands have sensors built into the fan to confirm operation and can also cause shutdown if not running fast enough or at all...


Posted on Nov 23, 2008


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Don't understand why local channels no signal it is not storming

Do you have an internal or external antenna? Does you have an signal amplifier, signal splitter or switch connected?

If the TV was previously connected to this antenna and received multiple channels, check the orientation. External antennas can turn under some conditions. With digital (ATSC) signals, this can be a significant issue, as the tuner may not see enough of the signal.

If there was an powered amplifier attached, check if the unit is getting power. Next check if the signal improves when the amplifier, switch or splitter is removed. In my house, usually only a few channels will be initially blocked by a faulty amplifier. In that case, the amplifier turned into a signal filter for a section of the VHF range. Replace the amplifier or switch if it faulty. If you are using a switch, try an amplifier/splitter that will limit the signal attenuation.

Use or to check if where the antenna should point. assumes an external antenna and gives very conservative channel lists.

If the problem persists, check if another TV tuner works when connected to the antenna. You could connect a tuner box between the TV and the antenna as a solution. Tuners vary in signal strength sensitivity. Alternatively, replace the TV or the input board with the tuner. (If the TV is under warranty, contact the manufacturer. However, for most small TVs (under <32"), the repair costs are not worth the effort. Sites like can tell you if parts are available - this site specializes in parts from TVs that were damaged in shipping.)

I hope this helps.

Cindy Wells

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1 Answer

No power to amp

You probably have a bad channel or you could try unpluging the amp for 2 minutes and plug it in again to let it reset.

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Channel 2 protection light on in ep 4000

Will be no doubt the main power amp that has failed that is connected to that channel. It will be located on a big heat sink and be hotter than the other(s) channels if you go in after it's been on.

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1 Answer

Amplifier wont turn on. the orange ac light is on but nothing else

Check internal AC fuse. If intact, amplifier may be in protect mode due to fault.

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Where is the power switch, or how do you get the power running through to get blue light to turn on?

There is a terminal marked REM it's between the + 12 volt and Ground terminal.
The REM terminal needs a power source connected to it to turn the amp on and off. It's usually the blue remote wire coming off the head unit.
This turns the amp on when your head unit is on and turns the amp off when the head units off.

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One channel muted until the volume is turned up

This problem is usually dur to some corrosion in the speaker relay. If the relay can be opened, burnish the contacts and you should be OK. The higher volume creates a higher voltage that can "jump the gap" so to speak. Once the connection is made it will remain. That is why lowering the volume will work.


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Fuse melts when turned up all the way

speakers are overdriving the amplifier you need a higher wattage.

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No sound

When the amplifier will turn on but not produce any sound that is usually an indication of either the high voltage power supply inside the amplifier is not working, or the amplifier IC or amplifier circuit is damaged. It is not something that can be repaired unless you have experience working on electronics.

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1 Answer

No antenna reception with digital converter box.

Hello Faznmc,

I have found that with an ordinary antenna connected to the converter box it can receive nearly all channels, however I have run into cases where I had to use an amplified TV antenna to pick up signals. I have started telling folks that when they install their converter boxes to try to use the plain old rabbit ears antenna, but if that does not work, use an amplified antenna, and that usually does the trick.

I hope this helps
Thank you,

Nov 02, 2008 | Televison & Video

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