re mac plus is constantly rebooting in article c hsyu dxq hpuerca atl hp com russ hpuerca atl hp com russ hodes writes tae shin tshin husc harvard edu wrote basically the mac pluses are constantly rebooting themselves as if the reboot button were being pushed sometimes the mac is able to fully boot and display the desktop but it is only a matter of time before it reboots again at times the frequency is as high as several times a minute i wonder if your mac has those little reset interupt switches installed they are plastic devices that push on the switches which are inside the mac or mabey those switches are bad and need replacing this problem is usually a low vdc from the power supply there is an adjustment for this on the supply if the voltage is still unstable or low then the culprit is probably a bad rectifier at cr jeff hite computing center u of oregon jeffh ludwig cc uoregon edu
