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TV NOT WORKING

My TV doesn't come on when the power switch is pressed and, the power light isn't lit. I have put a circuit tester across the switch which appears ok. There also appears to be power at components beyond the switch.

Can you offer any advice/potential remedy?

Thanks

Bryn Powell

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Check at the Horizontal section and test for any defective transistors. This type of problem are usually at the Horizontal output. cheers.

Posted on Nov 27, 2008

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If you put the tester on the outlets and it lights up properly but the bulbs dont, you have already concluded that the wiring isn't the problem. unless of course the wires are corroded and simply putting the bulb in shorts it out. Have you tested the bulbs?

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I have a IZIP I200 scooter I replaced the batteries and still does not woork


Although your device isn't a mobility scooter, they share many similarities. The following info should be of help to you

If when switched on you don't get lights you are not getting any power to the tiller head, the meter should be reading voltage regardless of the condition of the control circuitry. My first scooter was a very old AMIGO, it sat in a barn for 20 yrs, this was anything but a dry environment.As a matter of fact i has to a power washer to clean the two inches of Chicken manure off it. This scooter was so old that it has an discrete component open controller board as opposed to fully potted and enclosed LSI based controllers we see on todays scooters. The engager in the tiller was oxidized, and had to be cleaned and dried out. I rinse the controller out with distilled water then put it in a preheated oven at 150 F for 24 hrs. WARNING make sure of the temperature some ovens will not go this low. The newer controllers are potted and enclosed, making them water resistant, they use LSI which are proprietary and can't be purchased or repaired. I liked older controllers because you could fix them.

What you got to do is what we call "chase the voltage" First you will need a 24v circuit tester
http://www.amazon.com/OEM-25886-6-24V-Circuit-Tester/dp/B0014WIVX6

You may also need a VOM meter only $9
http://www.amazon.com/Mastech-YG188-Pocket-size-analog-multimeter/dp/B00064CH6A/ref=sr_1_8?s=hi&ie=UTF8&qid=1339024102&sr=1-8

The problem is 24volts is either not getting to the tiller head or you have a broken wire in the tiller head. Start at the headlight make sure its switched on. Use the circuit tester, put the clamp to ground, use the probe to find the 24volts, The hot side is the side wired in series with the switch. The tester will light up when it has voltage. Chase the wire back through the system. When you get to a cable or anywhere you can't see the wires use the VOM meter, disconnect the scooters batteries leaving the power switch on. Set the meter to read resistance scale high scale, short the probes together, zero the meter. Put one probe at the headlight the other probe at the connector you think the wire ends up at. Normally every wire is a different combination of colors like red; with a white stripe. Most of the time a wire ends up at a connector and the color code doesn't change. So if you are not getting continuity on any of the pins on the connector you know its got to go, you've isolated the open circuit too the tiler head. Here's a test you can run! Turn headlight on, power on for scooter, disconnect scooter battery, place one probe at head light. Disconnect tiller cable. Probe each pin, one of them hast to cause the meter to deflect to zero. If if doesn't the problem is in the tiller head. When working with little wires i like to use crochet needles. You can use the meter to check cables each pin in must have a pin out. If you don't get continuity between pins the cable is bad toss it.

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1 Answer

Invacare auriga runs well but no headlight or indicaters any ideas


What you got to do is what we call "chase the voltage" First you will need a 24v circuit tester
http://www.amazon.com/OEM-25886-6-24V-Circuit-Tester/dp/B0014WIVX6

You may also need a VOM meter only $9
http://www.amazon.com/Mastech-YG188-Pocket-size-analog-multimeter/dp/B00064CH6A/ref=sr_1_8?s=hi&ie=UTF8&qid=1339024102&sr=1-8

The problem is 24volts is either not getting to the tiller head or you have a broken wire in the tiller head. Start at the headlight make sure its switched on. Use the circuit tester, put the clamp to ground, use the probe to find the 24volts, The hot side is the side wired in series with the switch. The tester will light up when it has voltage. Chase the wire back through the system. When you get to a cable or anywhere you can't see the wires use the VOM meter, disconnect the scooters batteries leaving the power switch on. Set the meter to read resistance scale high scale, short the probes together, zero the meter. Put one probe at the headlight the other probe at the connector you think the wire ends up at. Normally every wire is a different combination of colors like red; with a white stripe. Most of the time a wire ends up at a connector and the color code doesn't change. So if you are not getting continuity on any of the pins on the connector you know its got to go, you've isolated the open circuit too the tiler head. Here's a test you can run! Turn headlight on, power on for scooter, disconnect scooter battery, place one probe at head light. Disconnect tiller cable. Probe each pin, one of them hast to cause the meter to deflect to zero. If if doesn't the problem is in the tiller head. When working with little wires i like to use crochet needles. You can use the meter to check cables each pin in must have a pin out. If you don't get continuity between pins the cable is bad toss it.

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1 Answer

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Continuity testers are used on dead or un-powered circuits only. Likewise, they need to be tested prior to use to make sure that the battery, lamp, etc. are in good working order. Testing is done simply by touching the probes together. When connected to each other, note the intensity of the indicator - whether it is a lamp, audible alert or other indication. This is your 100% continuity reference indication.

If there is a complete path or circuit between the probes on the tester, an indication will be given. This could be brightly lit lamp, tone or buzz sound from a speaker, etc. A circuit with only fair or poor continuity may provide a dimly lit lamp or a "sick" sounding buzzer. Keep in mind that some items under test may have very poor continuity - say 20% or 30% or other unknown value that will not be sufficient to provide an indication - but will still conduct. This should alert you that a continuity tester really isn't a "no go" indicator. This is important to remember. This is where an Ohm meter shines when compared to a simple continuity tester. It will pinpoint just how much continuity there is in a circuit.

I hope this helps!

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Usually there is a cluster of fuses running 4 across and about 8 down on this panel.
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