Is that a yo-yo adapter? Every one I've come across can and will fail within time. It's usually due to the crapy mains power cable burning out, or fraying on the DC connector of the unit. You're better off getting a third-party adapter or later square white adapter for these things.
Love my Pismo here - it's a tank. Cost me $50 and all I had to do was pull the PRAM battery to get it to come to life. Now configured as 450Mhz/768MB RAM/80GB HD and Airport - perfect road warrior
JB