Help Needed repairing NDSL mainboard please

[Scobie_21]

Folks any help would be great.
I cannot get a service manual anywhere.

I have a couple of Nds boards that I am finding difficult to repair without schematics.They both exhibit the same fault ie no power no Leds both fuses are ok on both boards and tried with new working top and bottom screens.Also tested with working batteries and checked power switches on both.

Any ideas?

Rgds

[Thaiboy]

Is your connection From the Top LCD to the mobo totally secure?
Maybe you could check that.

When I fist fixed a DS Lite, I thought that I had the ribbon in securely, but the ds didn't turn on until I tried putting the ribbon in again.

Just a suggestion.

[colja2002]

bridge the powerswitch layer of the mainboards