Totally dead Texas Star DX667V Amplifier

Check the main fuse.

https://www.google.com/search?q=1985+honda+big+red+250es+main+fuse

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In the event that no lights coming on in the dashboard and no other electrical buyers work, the battery could be totally dead or there is no association between the battery and the vehicle electrical framework. Check in the event that the battery terminals look tight. On the off chance that the battery is totally dead, kicking off might help.
www.autoparts-miles.com/used-engines

which model how old

if totally dead no lights up
gee
power source failure
any inbuilt fuse ?
shorted out wall plug

if there was a buzz or click or hum to speakers
would give it some hope

Did you check that F1 (red arrows)?. You must open the aluminum cooling in order to find the fuse F1, because it was on the inside, not visible. Usually one of the causes of rupture F1 is one or more diodes (d4/d5/d6/d7) is broken. Check and measure the diode. May also occur, F1 break up just like that, without any other components that causes. This can happen when we open a high level for a long time. It is designed so that the final transistor (which is expensive) not be damaged. Hope it helps.

if no any power indicator the first place to be check is the power supply where in the fuse get blow. if the fuse blown with darkened color that was mean has shortened line, might the amplifier circuit get damaged that cause of popping before it totally down.check for bad amplifier ic and shorted diodes.

Perhaps the microwave's main supply fuse has blown.Open the cover & check it in the power supply section.Be careful & discharge the big capacitor first as there is very very high voltage present inside even after switching off.

Find your fuse panel. Take a picture of it with your cell telephone. With the car off, with a volt meter, remove the fuses one at a time. Measure every slot to find out what is hot and what is not. Any Hot circuits should be examined closely to find out what is ON when the car is OFF.

Places to look ... light in the trunk??? is it on or off with the lid closed? Under the hood? Same. Do you have a radio that comes on with the key off??? GPS, you leave plugged in? Cell phone or other gadgetry you may have plugged in to the aux power supply? Any other lights? Parking lights for example? Security system? CB radio?

After you have checked these items, and if you find nothing, you may want to have your alternator examined. If you have a shorted diode in the alternator, the power may be draining back to ground through this shorted diode. You could perform this test yourself by unplugging or disconnecting the alternator during the periods when you are not driving the car. If this is the trouble, on day three, when you reconnect the alternator, two things you will note: 1) there will be a pretty big spark & 2) you will still have charge in the battery (evidenced by the spark)(there will be some spark no matter what ... but a big spark will mean a big drain). I have seen shorted diode problems fixed by inserting a toggle switch in the alternator power circuit. The alternator will still charge the battery when the switch is ON with the car running. When you stop the car, turn the switch off, power will not drain through the alternator to ground. Probably not the solution for your Mercedes. The real solution is to replace the alternator.

BTW - do you have a security system in your car? A thief proof radio? Check your owner's manual for precautions you should take before disconnecting your battery with regard to the anti theft features of your vehicle.

You say your battery is new and dead after three days. If fully charged on day one, and dead on day three, that means your battery has expended between 500 (economy battery) and 1000 (premimum battery) "amp hours" of power (500 amps / 72 hours = about 7 amps per hour going somewhere. (An 'amp hour' is one amp for one hour) Ohm's Law applies.

I hope you find your trouble and I hope I have given you a few leads. Thanks for allowing me to assist you with this problem this morning ... good luck.

Thanks for using FixYa.com today.

Check all lights are working.

If totally dead, check wires connected OK.

Reset with pen tip or opened out paperclip while holding power in.

All lights will stay on for 10 seconds then it should reset.

If totally dead, still, check fuses

No Power (Totally Death).

1. Check the output regulator 12volt DC Power Supply.
2. Check the Fuse (Voltage Security Fuse).
3. Check the Flexible cable on switch board (reset & eject button).
4. Check the Output Diode.
5. Or check the I/0 button.
   

Yes, your amp could be done. Check the fuses on the amp then re-install the amp. Even if the fuses look good change them anyway.