When you disconnect the AC cord you are loosing the [https://en.wikipedia.org/wiki/Standby_power|vampire power] the system requires to hold the PRAM settings, so the small Li-Ion button battery is used. What happens here is the battery is worn-out from age and lack of use! So the system looses its settings. But, when you plug in your system again and let it sit for awhile there is enough power leaking to the battery to give it a bit of a charge (not designed to charge though) so the settings become available after awhile, this only lasts a few times before the battery can’t be charged anymore.
Time to replace the battery! Follow this guide to get to it [guide|4735]. You’ll find the silver disk button battery in the bottom right corner near the speaker - 3 volts BR2032.
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The other possibility is the Power supplies capacitors have failed do to [https://en.wikipedia.org/wiki/Capacitor_plague|Capacitor Plague] that will require a new power supply.
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The other possibility is the Power supplies capacitors have failed do to [https://en.wikipedia.org/wiki/Capacitor_plague|Capacitor Plague] that will require a new power supply [https://www.ifixit.com/Store/Mac/iMac-Intel-24-Inch-EMC-2267-2-66-2-93-3-06-GHz-Power-Supply/IF169-001?o=1]
When you disconnect the AC cord you are loosing the [https://en.wikipedia.org/wiki/Standby_power|vampire power] the system requires to hold the PRAM settings, so the small Li-Ion button battery is used. What happens here is the battery is worn-out from age and lack of use! So the system looses its settings. But, when you plug in your system again and let it sit for awhile there is enough power leaking to the battery to give it a bit of a charge (not designed to charge though) so the settings become available after awhile, this only lasts a few times before the battery can’t be charged anymore.
Time to replace the battery! Follow this guide to get to it [guide|4735]. You’ll find the silver disk button battery in the bottom right corner near the speaker - 3 volts BR2032.
+
+
The other possibility is the Power supplies capacitors have failed do to [https://en.wikipedia.org/wiki/Capacitor_plague|Capacitor Plague] that will require a new power supply.
When you disconnect the AC cord you are loosing the [https://en.wikipedia.org/wiki/Standby_power|vampire power] the system requires to hold the PRAM settings, so the small Li-Ion button battery is used. What happens here is the battery is worn-out from age and lack of use! So it looses its settings. But, when you plug in your system again and let it sit for awhile there is enough power leaking to the battery to give it a bit of a charge (not designed to charge it though) so the settings become available after awhile, this only lasts a few times before the battery can’t be charged anymore.
+
When you disconnect the AC cord you are loosing the [https://en.wikipedia.org/wiki/Standby_power|vampire power] the system requires to hold the PRAM settings, so the small Li-Ion button battery is used. What happens here is the battery is worn-out from age and lack of use! So the system looses its settings. But, when you plug in your system again and let it sit for awhile there is enough power leaking to the battery to give it a bit of a charge (not designed to charge though) so the settings become available after awhile, this only lasts a few times before the battery can’t be charged anymore.
Time to replace the battery! Follow this guide to get to it [guide|4735]. You’ll find the silver disk button battery in the bottom right corner near the speaker - 3 volts BR2032.
When you disconnect the AC cord you are loosing the [https://en.wikipedia.org/wiki/Standby_power|vampire power] the system requires to hold the PRAM settings, so the small Li-Ion button battery is used. What happens here is the battery is worn-out from age and lack of use! So it looses its settings. But, when you plug in your system again and let it sit for awhile there is enough power leaking to the battery to give it a bit of a charge (not designed to charge it though) so the settings become available after awhile, this only lasts a few times before the battery can’t be charged anymore.
Time to replace the battery! Follow this guide to get to it [guide|4735]. You’ll find the silver disk button battery in the bottom right corner near the speaker - 3 volts BR2032.