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dm500hd ferrari don't start
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dm500hd ferrari don't start - 31-January-2012, 14:26

Model: 500hd motherboard green + sim ferrari red

Well, I did some test for solve the problem. The problem appear not easy, I think there are a bug in the soldering of the motherboard.

1. For the first test I connected the decoder to pc with service port, I have made test with 2 different pc. DM and PC are not communicating with software Ferrari Filler, so it is impossible to send the firmware.

2. I open the case for check if the connection internal cable is ok, but i found a capacitor unsoldered and a strange connection under the motherboard.

3. I resoldered the capacitor but dm don't start well. Only all 5 red leds in the mb lit on.

4. I removed white wire under the mb and decoder start well. Led red only 2 and 5 on and front led start and fan running. I think I've solved the problem but it is not.

5. Now this is the situation:
- when dm are out of the case it starts well, I can connect with putty. this is a photo

- when dm are in the case don't start well, apper in protection mode.

- when decoder are out of the case but whit hdmi or sat cable connected don't start.

Seems that when a single point is connected to the gnd, the screw or hdmi and sat cable dm don't start.
For me is a bug in a connection of the motherboard, but is impposible to find.

any ideas?
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26-February-2012, 13:52

Does not sound too healthy - did you buy it new or second hand I'd wonder?

If you bought from new I'd put that wire back in as it must have some purpose.

It sounds like some component could be shorting out but when grounded maybe some stray voltage is coming back in to the board through ground. Would be interesting to check for voltage between neutral and ground.

Could it even be an external problem - do you have other boxes going to the same dish via disecq? Could be a problem with the switch?

Although you could pick up a cheap clone instead! Best of luck with the repair though!

(26-February-2012 14:55)
Actually just as an idea - you could try and ground the whole board to a better earth if your ground is running 'hot' on the board. Earth it to something else. Maybe ground it to the your housing ac system earth.

Last edited by donegalvolvo; 26-February-2012 at 13:55.. Reason: Automerged Doublepost
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10-May-2012, 05:21

defo sounds like its shorting on something. check no component is protruding and touching the case. As doneg says earth it to an earth but please use a decent earth because a crappy earth causes a multitude of problem. Check over all tracks on the pcb, check for any damage on components ect, run a meter accross to see if any voltage is coming back or in to earth. Then report back and let us know how you get on.
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