Laptop PSU only giving out 13v,should be 19v
01-03-2007, 09:45
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#1
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Inactive
Join Date: Dec 2003
Location: Manchester
Posts: 993
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Laptop PSU only giving out 13v,should be 19v
Is there anything I can do to bring it back to life?
Cheers.
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01-03-2007, 09:56
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#2
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Inactive
Join Date: Jun 2003
Location: Abertawe
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Re: Laptop PSU only giving out 13v,should be 19v
How did you measure the voltage?. If it is correct there's not much you can do, laptop PSU's don't have any user serviceable parts (unless you're happy playing with mains voltages it's best to leave it alone).
Maplins sell a replacement unit (on offer at the moment)
http://www.maplin.co.uk/module.aspx?...5&doy=1m3#spec
DW
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01-03-2007, 09:58
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#3
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Inactive
Join Date: Dec 2003
Posts: 503
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Re: Laptop PSU only giving out 13v,should be 19v
very unlikely,
it will be a switched mode psu, so one big feedback loop, very difficult to fault find on, even more so with out a circuit diagram.
Have to bite the bullet and source a new one, prices vary widely - google will be your friend here
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01-03-2007, 10:10
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#4
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Inactive
Join Date: Dec 2003
Location: Manchester
Posts: 993
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Re: Laptop PSU only giving out 13v,should be 19v
Thanks a lot.
The missus is off sick at the moment and the only thing she wants to do is lie in bed and MSN people.
Unfortunately, her PSU died last night.
There is a PC World right near her but they are £70 in there.
Microdirect do them for £20 Plus VAT so I said I would bring her one home.
---------- Post added at 10:10 ---------- Previous post was at 10:07 ----------
Sorry, it was measured by PC World.
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01-03-2007, 10:17
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#5
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Re: Laptop PSU only giving out 13v,should be 19v
Quote:
Originally Posted by McGraw
Sorry, it was measured by PC World.
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That fills me with trust 
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01-03-2007, 10:34
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#6
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Inactive
Join Date: Jun 2003
Location: Abertawe
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Re: Laptop PSU only giving out 13v,should be 19v
I wonder how they checked it, off load or on load? In any event it's cheaper to buy a replacement than repair the faulty one, that's the way it is these days.
DW
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01-03-2007, 10:54
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#7
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cf.mega poster
Join Date: Jun 2003
Posts: 2,232
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Re: Laptop PSU only giving out 13v,should be 19v
what make lappy is it mate, if it is Dell then I have a spare one you can have for £20
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01-03-2007, 11:10
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#8
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Guest
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Re: Laptop PSU only giving out 13v,should be 19v
does the power supply charge the battery? and if it does does the laptop work ok when its plugged in? if you answer yes to both these questions why worry?
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01-03-2007, 15:03
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#9
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Inactive
Join Date: Dec 2003
Location: Manchester
Posts: 993
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Re: Laptop PSU only giving out 13v,should be 19v
No idea how they tested it, sorry.
It was a lite-on for Toshiba. I'll be replacing it with a trust one for about £20.
It doesn't charge the battery at all.
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01-03-2007, 17:37
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#10
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Inactive
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Re: Laptop PSU only giving out 13v,should be 19v
Maplin sell them at not unreasonable prices if you havent already got one.
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01-03-2007, 18:51
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#11
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Inactive
Join Date: Dec 2003
Location: Coventry
Posts: 1,003
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Re: Laptop PSU only giving out 13v,should be 19v
Just a word of caution if the P/Supply was checked on load ie connected to your lappy then there is a possibility that there is a fault with your laptop that is pulling the voltage down.
If the batterie is inserted then take it out and try your p/supply without it.
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02-03-2007, 18:52
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#12
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Inactive
Join Date: Jun 2003
Location: Sunny Scunny, North Lincolnshire
Posts: 1,068
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Re: Laptop PSU only giving out 13v,should be 19v
Agreed, the charging circuit in the laptop could be faulty, or even battery at end of it's life.
As banjo said, try using it with the battery out, works on Compaq laptops, not sure about Tosh
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