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LAPTOP dont work. :)

By crmbymike_pc ·
client brought in a NEC ultralite III notebook. when I plug it in all i get is teh battery light no sounds no picture nothing. i am thinking not enough power. question is how would test the power output of a laptop powersupply.
Mike

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LAPTOP dont work. :)

by TheChas In reply to LAPTOP dont work. :)

Power Loads are what you need.

I am assuming that this noebook uses an external power supply.
(testing internal power supplies in a laptop is difficult)

The power supply should list the different output voltages and either current or wattage.

You then need to create a resistive load for each supply.

75% of rated current output is enough to test the supply.
Let's say the supply provides 5 Volts DC at 3 Amps
5 volts * 3 amps = 15 watts.

We want to test the supply at 75% of ratedcurrent, so we need a 2.25 Amp load
R = Volts / Amps, so we need a 2.22 Ohm 12 Watt (2 ohms to 2.25 ohms at 15 watts or more is fine) load to connect across the 5 volt + and ground lines.

The loaded output should be at least 90% of the rated output voltage, or 4.5 Volts for a 5 volt supply.

Do the same for each voltage the power supply provides.

Unless rated otherwise, the power supply should provide the correct voltages with all outputs loaded to 75% of their rated current.

Chas

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LAPTOP dont work. :)

by crmbymike_pc In reply to LAPTOP dont work. :)

The question was auto-closed by TechRepublic

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LAPTOP dont work. :)

by zoka11 In reply to LAPTOP dont work. :)

you maust have BIOS beeps /1-3-4-1/problem = memmory or m.board on some BIOS. Try take out and reinstall ,chek battery connection
may help

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LAPTOP dont work. :)

by crmbymike_pc In reply to LAPTOP dont work. :)

The question was auto-closed by TechRepublic

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LAPTOP dont work. :)

by crmbymike_pc In reply to LAPTOP dont work. :)

This question was auto closed due to inactivity

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