Oh bu##er (1 Viewer)

[Figaro]

I've bought an adapter for my laptop to step up 12v to 19v to use it in the MoHo but when I plugged in it didn't appear to work. So I plugged lappy back into mains adapter and ......... nothing !
Could I have blown a fuse on the lappy ? Does anyone know where it would be ?
It's a 7 year old hp.
TIA

Edit : what a numpty, wall socket was switched OFF !
I`ll look into why 12v adapter didn`t work later

 

[Linda and Steph]

Just so you know for the future, laptops don't have internal fuses, they're low voltage so any fusing will be at the power block.

 

[Figaro]

Following on from my traumatic moment yesterday when I thought I'd blown up my lappy, I checked the outputs from the adapters. The mains adapter outputs 19v 3.5 amp while the 12v adapter outputs 19v 4.7 amp.
Is this difference likely to be a problem for the laptop ?

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[lunarman]

Have you checked the polarity of the 12v adapter to make sure it is the same as the mains one?

 

[Figaro]

Have you checked the polarity of the 12v adapter to make sure it is the same as the mains one?

No going to do that later, thanks for reminder

 

[SandraL]

Some laptops have a 3 wire jack. A skinny centre pin, an inner sleeve and an outer sleeve. The skinny pin can be/is a signal wire. Without correct signal laptop will not charge.
I,m really not 100% sure of this, hopefully someone can put me right..... or maybe confirm?

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[tonyidle]

Following on from my traumatic moment yesterday when I thought I'd blown up my lappy, I checked the outputs from the adapters. The mains adapter outputs 19v 3.5 amp while the 12v adapter outputs 19v 4.7 amp.
Is this difference likely to be a problem for the laptop ?

No - current is drawn as needed. The 12v adapter just has a higher safety margin.

 

[magicsurfbus]

I had a 12v adapter for a TV which stepped up the voltage. For some reason the TV would only work if I switched the adapter on first with it disconnected from the TV, let it (for want of a better expression) warm up, then plugged it into the TV. If all were connected up when I plugged the 12v in, the TV wouldn't start. Just a thought anyway.

As an afterthought, our leisure battery was 8 years old, and running the TV always took it below 12v. Has your leisure battery got all the necessary oomph to step up the voltage?

 

[daveandsan]

Some laptops have a 3 wire jack. A skinny centre pin, an inner sleeve and an outer sleeve. The skinny pin can be/is a signal wire. Without correct signal laptop will not charge.
I,m really not 100% sure of this, hopefully someone can put me right..... or maybe confirm?

Yes, you are correct. My Dell laptop won't work without a Dell charger.

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