How to Repair a Dead Belkin Wireless DSL-/Cable Router (F5D7230)
How to succeed in repairing a dead WLAN-g/cable router Belkin F5D7230-4. The router was just dead, but the external power-supply was working properly.
After opening the device (two screws covered by a metal-foil-sticker on bottom side) I checked the voltages and found, that the 4.5V to 3.3V converter AME8815 BECS330 did not output the required 3.3 Volts (between pin-1 and pin-2=heatsink).
Since I could not get the identical sparepart I just took a cheap LM317 adjustable voltage regulator, bent pin-1 upward and soldered between pin-1 and pin-2 a 240 ohms resistor. Pins-1 and pin-3 of the AME8815 were cut. Then a 390 ohms resistor was soldered between the pin-1-contact point of the broken AME-8815 and pin-1 of the LM-317. Pins 2 and 3 of the LM317 finally were soldered to the same pin-2 and pin-3 contact-points, which were used by the broken AME8815. That's it, my Belkin G router is now working fine again.
Disclaimer and Credits
Warning: These instructions are given without any warranty. They don't have to be complete or correct. Don't do any of the following steps if you're not sure of what you're doing. You could damage your WLAN router and you WILL lose your warranty. Everything you do will be at your own risk.
This guide is a courtesy of Johann Knoglinger.