DM500s no voltage when plugged into lnb

[fatslob2007]

hey guys,
i have similar problem, although on mine, when i check the voltages on the lnb, they are 14v and 18v (without anythign plugged in)
i also swapped the tunerpart, and the q72 transistor, however i cant get a lock on anything. ive done a reset, and even put original dm500s image, and still nothing. ohh and i also plugged another box on the same lnb/cable/dish and it can lock a signal.

any suggestions?

[Fernbay]

So the tuners OK then...

Tried another external PSU?

[fatslob2007]

yeah tried another power supply.same thing

[digitaldvd]

did you try to supply the lnb from another receiver and put the dm500 thru a power pass splitter, if it was like mine the dm500 worked perfectly as the lnb was being supplied by another receiver hence no load on the dm500.

[fatslob2007]

yeah might give that a go. if that works, then what would be an issue on the dm500 then?

[fatslob2007]

ok tried using a 2nd box and having the dreambox as a passthrough connection.
still nothing.

[digitaldvd]

ok tried using a 2nd box and having the dreambox as a passthrough connection.
still nothing.

Did you use a single power pass splitter so that the second receiver is the one that powers the lnb through the power pass and the other side of the spliiter to the dm500 has no power thru it and only signal if you have done this and no joy then you have a bigger problem nothing ventured nothing gained

[raygbmw1]

thanks for the reply
i think i may have solved the problem, well er sought of i have now lost the 18v supply and now suspect a dry joint on one of the smds as i was going over this section with a soldering iron and may have disdurb a contection or i may have just destroyed something else but the receiver is still picking up a signal ok, i will plod on
Thanks again

Digitaldvd

What exactly did you do if you remember? I have the same problem now. No power but will be ok when the lnb is powere by another box in a series.

Regards
Ray