Question about HP Compaq nc6400 Notebook

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MY NC9400 CANT TURN ON, WHEN I PUSH THE BUTTON, THE BATERY LED INFRONT OF THE COMPUTER JUST FLASHES 8 TIMES, BUT COMPUTER DOESNT TURN ON, IS THE SAME PROBLEM WITH THE CHARGER CONECTED TO THE ELECTRICITY AND WITHOUT IT (WORKIG JUST WITH BATTERY). HOPE YOU CAN HELP ME..

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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

Posted on Sep 18, 2010

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I have panasonic hdtv pt-59cl14 wont turn on when push power button the lamp light blinks red then the power button flashes yellow/orange 8 times then repeats . Any suggestions


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
http://electro-medical.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience.

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MY Sharp LC46D62U wont turn on


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1 Answer

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The L.E.D. located on the tiller
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