In article ,
Dave writes:
Daughter bought her daughters an in car dvd player with 2 screens and it
has decided to break down.

On looking at the cigar plug end of the power cable, I found a blown
fuse, so I changed the 3 Amp for a 2.5 which is all I have in stock at
the moment and it has blow 2 of them so far.

I measured the resistance of the DVD play power input and it measuered
400 Ohms one way and 800 Ohms when I reversed the multimeter leads. I'm
thinking of buying some 5 amp fuses a.m. and see what it does to them.

I could conect it up to a variable power supply and see what it is
drawing through, but I thought that this was an unusual thing to happen.

Any ideas anyone? Or does it have to go for repair?

Dave (a bit out of touch with this DVD technology.)

Check carefully for any obvious damage such as crushed cables.

Otherwise, I would guess the car supply is probably fed into a
switched mode PSU to derive the stablised supplies the circuitry
needs, and this has gone pop.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]