KVM switch problems- have bought a new KVM USB switch, started off working fine.. now the green lights are blinking back and forth in sequence and one PC is stayingt on, whilst the other clicks off after a few seconds. At my wit's end. Please help.

If its a usb kvm, check usb connections, one computer should stay fixed, the one that doesn't is your problem

now i bet you wont belive this theory but i think microsoft willfully and maliciously design software that "bricks" and crashes Linux systems

search for WIN 7 & KVM switch issues... you will find thousand of hits, because WIN 7 has one unique feature where it disables internal and external ports if these are not in use.

In a KVM solution setup this would mean, while you are connected everything is fine, now when you switch over to your (Lets say) WIN XP and work for 30 minutes on it... and then switch back, WIN 7 might have already scanned and seen that the USB port where the KVM cable comes in is IDLE... so it disconnected it... you cannot get it back until you reboot your WIN 7 system. Its not the KVM solution is one of those Microsoft wonder weapons that breaks what has worked for 20 years

There are no firmware updates for the GCS62 also the KVM appears to not have a firmware upgrade port. If the KVM is auto-switching have you tried hitting the ESC key or Space Bar? That should stop the auto switching.

Push the HeatDry and High Temperature buttons at the same time
Then:
punch these buttons back and forth until lights light up (about 5 times) then:
Hit cancel

RMA!!!!!

Depending on the KVM (Brand, Model etc) there should also be a hot key sequence that will allow you to switch between the PC's. See if the hot key sequence works.
Also, is this a PS/2 KVM or USB ? In some cases with USB adapters you have to let the computer start up while it is set to that port. And if it is USB, does it also have a PS/2 connector? If it does, you want to use one or the other, not both. That can cause it to malfunction.

Yup, it seems a lamp problem can give a blinking green light over the 10 times (1 - 10 times for diagnostic codes), but in my case rather than replace the bulb if it works for a minute then resets with the green light blinking, do what I did.
Take the lamp out and inspect it, it has breather screens top and bottom, if it cant breath because there clogged with dust, clean them, and you can remove the screens, use q-tips and clean the inside. I saved the cost of a lamp and it's working fine!

whenever i turn my xbox on the light around the power button turns from red to green and nothing happens.

I occasionally have a similar problem with a couple of my KVM?s and I think it relates to the circuitry in the KVM that is supposed to fool the PC into thinking a mouse/keyboard is attached. Windows doesn?t see the mouse so it doesn?t load the drivers unless you force it. What works for me is to just start the PC and switch the KVM to that PCs port and leave it there till the computer finishes booting. Then its safe to switch to the other port, probably not the elegant solution you were looking for but it works every time.