Ref:hp pavilion f 1503 power supply

Ohm's law tells us that: volts = amps x resistance and watts =volts x amps. Watts (300) = volts (240) x Amps (?); or 300 / 240 = 1.25 Amps That means the inverter can supply up to 1.25 Amps to a 240 volt load.

The primary is 12 volts, this is just 1/20th of the secondary 240 volt output. Since the best you can ever get is 100% efficiency -this means you'll need to supply 20 times the current. 1.25 Amps (at 240V) x 20 = 25 Amps (at 12V). As a check, from above Ohm's law that states Watts=Volts X Amps we get: 12VDC x 25Amps = 300Watts. Check!

Some side notes. The Ohms law used above is for DC circuits and purely resistive loads on AC circuits. I do not know what your 1.25 A @ 240VAC load is - but I suspect it won't be purely resistive. Also, since we're working with an electronic inverter as opposed to a transformer and DC rectifier there are some things that push losses higher. You might need to provide a 30 Amp 12 VDC source voltage in order to provide the 1.25A @ 240VAC output. Lastly, I wouldn't not run the output at maximum for long periods of time - or at all. 1 Amp @ 240VAC would be much better.

I hope this answered your question & good luck! Please rate my reply - thank you.

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Advueu ADV178B LCD Monitor POWER SUPPLY CORD
19V AC power adapter for Advueu Technology EZ18A LCD monitor
Adapter Type: LCD monitor power supply

Input Voltage: 100-240VAC (50-60Hz)

Output Voltage: 19 Volts DC

Amperage: 3.16 Amps
Price: $24.99

The following power supply unit (PSU) should work just right, however, it will not fit in a company branded case such as HP, Compaq, Gateway, Dell, etc. sine they all use proprietary parts and cases:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817339019

I've got the same Snap Server 1000 and lost the supply some time ago - I found a LiteOn monitor supply model PA-1400-02 does the trick and fits exactly.

Spec is 3.33A 12Volts DC out, positive inner, negative outer.

Hope that helps.

the transformer I have says:
DC output: 12Vdc == 2A
hopefully that helps...

Believe it or not, I got given a f1503 not working but without the power cable. He said the same thing everyone else is saying. I did not have a 12 volt 3amp converter but a 12 volt 1.5 amp converter. Plugged it in turned it on and wow it worked fine. It has been working for 1 week on with no problems. So try a different power converter, worked for me.

THis is a problem of the invertor board.If you are technically able you need to disasseble the monitor and resolder components around the red or yellow inverter transformers.
Samir

I did a little hunting and it seems you really want to use your 110v charger on a 230v supply.....

So you could use a transformer (LINK)

or you could get a local power supply pack.

Read the label on back of power pack that attach's to wall socket and charger base, see what input it can handle, some gear can handle like 110v-230v, others cant ie will read 120v

Any adaptor that puts out the same output as the original would work ie 18v DC 2.5 amps is your specs i beleive so use a transformer or another suitable adaptor

Please check my quoted specs are the same as listed on power pack of your charge ie I am assuming you are using your 110v A.C. to 18v 2.5amp D.C power pack

all you needs is a step tranformer from 110v to 220v ac