DR-MH300SE starts after plug in, but then does nothing
Posted: Sun Mar 03, 2013 11:50 am
Hello, I have this MH300, which after plugged in starts "please-wait", I can hear as the hdd runs and works, if while starting I press the open tray, it opens.
After a while, it stops and remain normal, display light less and the vps in red is "on", If I push play button on the unit, I can see how it "asks" me for the rm code, shows the actual and if I push any key on the rm, it changes to the new.
I have changed all the capacitors on the ps part, even the "little", 5 and 12 volts look ok, except Sw12v (on C5310) that are between 10 and 10,5.
I have connected an external power supply on cathode of 5203 (in fact the schema I have is not as the real machine, some components are not like drawn) and checked that I have then 12v on C5310, but it makes the same.
Once the unit has started and stops inicializing, lighs decreases and after a while it decreases more and blinks, as if any voltage were lower, but as the ps is on tha main board, I can do any test on 3,3 and other voltages.
Fan does not runs never, unless I short c-e in q5304, then it runs.
Any idea if it is possible fix? I thought to cut the lowest part of the metal box, in order to have full access on the main board, as the hdd/dvd control unit I have seen, that the metal is the heatsink of the circuits, or at least that looks to me.
Thank you for reading
After a while, it stops and remain normal, display light less and the vps in red is "on", If I push play button on the unit, I can see how it "asks" me for the rm code, shows the actual and if I push any key on the rm, it changes to the new.
I have changed all the capacitors on the ps part, even the "little", 5 and 12 volts look ok, except Sw12v (on C5310) that are between 10 and 10,5.
I have connected an external power supply on cathode of 5203 (in fact the schema I have is not as the real machine, some components are not like drawn) and checked that I have then 12v on C5310, but it makes the same.
Once the unit has started and stops inicializing, lighs decreases and after a while it decreases more and blinks, as if any voltage were lower, but as the ps is on tha main board, I can do any test on 3,3 and other voltages.
Fan does not runs never, unless I short c-e in q5304, then it runs.
Any idea if it is possible fix? I thought to cut the lowest part of the metal box, in order to have full access on the main board, as the hdd/dvd control unit I have seen, that the metal is the heatsink of the circuits, or at least that looks to me.
Thank you for reading