Russ, better do open up that brick first and check solder joints for breaks and resolder. I caught this too on 700C, same adapter for both series and few other TPs used this brick also. Also, sometimes solder joints on SMDs chips break loose. Check this on video board ceramic square IC leads to pads. On mine it was loose and check that 2 sticks of aluminum is still stuck to the two VRAM ICs. Mine were both broken loose. FYI: This parts are 80% interchangeable between 700 and 720 series. Word of warning to all solo 2300 owners: Check that one screw securing the bottom heatsink and motherboard is SECURE and better yet locked in place with loctite under the CPU daughterboard! This job requires removing the aluminum box (4 screws) and pulling the cpu module after removing one screw in middle in front of heatsink w/ fan. Caught this on two solo 2300 notebooks; one resulted in dead cpu module and revived other one thanks to this one loose screw touching underside of the cpu module. Ouch! Hint, quiet mode is true power mode will be higher performance, when cpu gets hot enough fan spins not other way around. Oops plus one typo error mistake on bios programmer. Performance mode results in overheating and slower performance because the fan is "disabled". GW2K will not sell any parts unless you have a major account with them or send in GW2K notebooks for repairs. Ebay or like or third party parts sellers was only way we could fix these GW2K notebooks. Accessing to innards is easy on this solo 2300, remove 4 black screws on back to get hinge cover off after opening up display 180 deg, 4 more to get keyboard gently flipped over or totally removed after pulling the retainer latch up. Don't forget to pull battery pack and power plug first. ;-) Wizard