Define older? When booted up, click on the Apple icon and choose About this Mac and share the details.My older iMac won't boot to the login screen. I have to cycle the power 7 or 8 times to get it to work. Once I get the login screen it works fine until the next power down.
Once I get the login screen it works fine until the next power down.
If your iMac requires you to press the power button several times before it switches on, this is a clear signal that your PRAM batteries are weak and failing. Additionally, something is amiss when you notice the screen displaying the wrong time and date. Another reason warranting replacement is when the screen appears unusually dark for a moment before resuming its previous state after a successful power-up. There is also a need to worry if some functions like printing settings fail.