Anyone have any ideas on my problem? I took my son's DSi out of a broken case and installed everything into a brand new housing. It worked fine before tearing it apart. Upon first power up, I had the bottom screen flashing on for a sec, then back off. I figured that was due to the upper screen's cable not fully inserted (I had the same problem on a DS Lite I fixed previously). I removed the mainboard again, fixed the ribbon cable and put it all back together. Now I started get the flashing orange LED. I have triple verified that all of the cables are correctly connected, but I can't get it to turn on again.
I have tried using the power supply board connected to the mainboard outside of the unit, and it flashes. Everything installed and all screens and ports connected, it flashes. I then tried checking the F1 fuse on the PS board, and found that it was dead. I replaced it with a jumper wire, and it still flashes. I checked the F1 fuse on the mainboard and it is fine. The orange flashing occurs if I have the battery in or out, but only starts as soon as I plug in the AC adapter. Sometimes I see the blue LED flash on very very quickly if I hit the power button, but other times it does not. But every time I hit the power button, the flashing light goes out and the unit does not power on.
I'm at a loss, can anyone provide any other ideas? I have some technical knowledge/skill, so I'm open to checking the mainboard if there is something there. Could I just have a bad mainboard or PS board? I appreciate anything you can offer. Thanks for reading!