Question about MA Audio HK4000D Car Audio Amplifier

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Same way its connected the same way it was before i took out the other amp how do i test the cap to find out if its defective or not

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If the cap is connected as it was before, disconnect the amp from the power source and replace the fuse. If the cap gets hot and is connected properly, it's defective.

If it only gets hot when the amp is connected, the amp may be creating excessive ripple on the B+ line (which can make a capacitor run hot).

Posted on Aug 16, 2008

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When i press power bottom it does not start but caps lock and scroll key(num lock) blinks


1. Take the battery out of the laptop & try to turn on the laptop using power adapter only. If the computer turns on, then the battery is defective & needs to be replaced.
2. Make sure the power adapter is not defective. Test the output voltage of the power adapter using a voltmeter. Compare the voltmeter reading to the nominal value written on the adapter or the laptop.
3. If you have another processor which is compatible with your laptop's model, try swapping processors & test to see if the laptop will work.
4. The power button could be bad.
5. The motherboard could be defective & needs to be replaced.

Sep 20, 2010 | Compaq Computers & Internet

1 Answer

When i press power bottom computer does not start but caps lock and scroll key(num lock) bottom blinks


1. Take the battery out of the laptop & try to turn on the laptop using power adapter only. If the computer turns on, then the battery is defective & needs to be replaced.
2. Make sure the power adapter is not defective. Test the output voltage of the power adapter using a voltmeter. Compare the voltmeter reading to the nominal value written on the adapter or the laptop.
3. If you have another processor which is compatible with your laptop's model, try swapping processors & test to see if the laptop will work.
4. The power button could be bad.
5. The motherboard could be defective & needs to be replaced

Sep 20, 2010 | Computers & Internet

1 Answer

Computer powers on but screen remains dark. Light by the caps and number lockskeep blinking. Wireless remains orange no matter how many times u press it.


1. Take the battery out of the laptop & try to turn on the laptop using power adapter only. If the computer turns on, then the battery is defective & needs to be replaced.
2. Make sure the power adapter is not defective. Test the output voltage of the power adapter using a voltmeter. Compare the voltmeter reading to the nominal value written on the adapter or the laptop.
3. Make sure the DC jack is not loose or broken. A loose DC jack will need to be re-soldered. A broken one will need to be replaced.
4. If you have another processor which is compatible with your laptop's model, try swapping processors & test to see if the laptop will work
5. The power button could be bad.
6. The motherboard could be defective & needs to be replaced.

Sep 11, 2010 | Compaq Presario Notebook

1 Answer

Power cap has power amp protect light is on ?


If there is a protection light then you have a bad power or ground connection. First thing I recommend you do is to get a regular test light with a ground alligator clip and test for a ground on your power cable. The way to do this is to place the alligator clip to either your amp turn on wire which is the small blue wire coming from your radio to turn the amp on or another powered wire and place the tip of the test light to the main power cable that powers the amp or the Capacitor and if your test light lights up then you have to trace the power cable from amp back to battery + terminal and see where the power cable is pinched or making a ground contact also check your blue amp turn on wire and see if it has a ground to it. If all this checks out then check your cars battery terminals, make sure they are not loose, corroded, rusty or damaged check fuses or take out amps fuses and reinsert to see if it resets, check all ground connections on amp and cap,if none of this works for you then you might have a defective cap or amp.

Good luck.

Jun 19, 2010 | Sony Xplod XM-554ZR Car Audio Amplifier

1 Answer

Emisssion test failed with 0p410 code/fuel cap failed


The gas fillup should be clue, either the gas cap was not tightened enough or it is defective.

May 15, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

What would cause my vue to lose power & die on the highway


that will not make your car to quit running. vue had problem with ignition module. it's easy to replace and it's right on top of the engine. a small, flat almost square silver box on the top of engine.

Apr 19, 2010 | 2003 Saturn VUE

1 Answer

Check engine light comes on with codes PO401 & PO442 where these sensors are its a 1998 buick century


P0401 sets when EGR flow test runs and fails. EGR may be moving too slow or not at all. May be a bad connection.
P0442 sets when vacuum decay test indicates small leak in the EVAP system detected during diagnostic test. Check for a loose or defective gas-cap. If the cap is fine it may be a false code or could be related to another EVAP component.

Feb 18, 2010 | 1998 Buick Century

1 Answer

I have a mtx thunder 1501d..i have the power cord connected from the battery, to a power cap and then to the amp...i have the ground connected to the metal frame of the car, to a power cap and then to the...


Hello tonytone54, The ground should go directly to the vehicle frame, never through a cap, fuse, or anything else. Also, if you are connecting positive through a cap, make sure that you charge the cap before connecting it. Hope this helps.

Jun 03, 2009 | MTX Thunder 1501D Car Audio Amplifier

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