Any standard errors on the mainbo. (no WiFi/no hard-reset (amber LED))
I've bought 2 broken units at eBay with different errors. In my opinion the Time Capsule-Models are made of better quality and don't have so much problems.
Unit 1: powers on, green light blinking, constant orange light. No WiFi but ventilation works!
Reset after removing power doesn't work > holding 6 seconds lead to blinking LED and after release it changes to constant orange light again
Unit 2: powers on, powers on, green light blinking, yellow blinking light. No WiFi! Ventilation doesn't work (cooler is working) and thermal-resistor is OK
Reset works but the same status comes up again.
The batteries were OK (3,09V / 3,02V) and were removed vor 5 minutes on both units. Unfortunately no success.
No connection via LAN to my router and no LEDs on my router when connected.
No water-damage or lightning-signs on the PCB...
Unit 3: was a Time Capsule with a non-working HDD. Here someone scratched 2 wires of the HDD-connector which I solved with a special and thin copper-wire
Unit 4: was also a Time Capsule with a broken HDD which started all over again. The change of the HDD solved the problem.
sorry I forgot to write that into the text. No, unfortunately not.
It seems (probably) that due to an over voltage the network controller / WiFi-IC is broken. My router doesn't recognize them i. e. the LED's on the LAN-sockets remain dark when I plug the Apple Airport Express.