주요 콘텐츠로 건너뛰기

1999년 10월에 발표되었습니다.

59 질문 전체 보기

Can a dying PRAM battery cause display and clock issues?

I purchased an iMac G3 a few days ago (for nostalgia reasons) and all seemed fine with it until last night when I booted it up again and the display was offset to the bottom of the frame, making it cut off. It also had these thin, shaking horizontal lines all the way down the display and when it completed booting up, the date and time was reset to 1902, I believe.

I first attempted resetting the PRAM to no success and then booted the iMac command line prompt to reset the NVRAM and the screen seemed fine in that mode. After it restarted, the screen seemed perfect again for a few minutes until the screen went offset again and the lines return. (The clock did not reset this time)

What could possibly have caused this and how can I fix it?

My theory so far is that it’s a result of the iMac being left unplugged for an extended period of time and has affected the PRAM battery somehow as that would explain the reset on the time and date. Would that also affect the display though?

Picture attached to show the horizontal lines and display alignment.

UPDATE: I left it on for half an hour this morning and the display keeps alternating between working normally and the offset resolution with the shaking lines again. Each switch lasting a couple minutes before going back to the other. Could this still be the PRAM still or would it be more graphics related?

답변되었습니다! View the answer 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 0
의견 추가하세요

Apple Watch Kits

Screen and battery repairs just got easier.

지금 장보기

Apple Watch Kits

Screen and battery repairs just got easier.

지금 장보기

1개의 답변

선택된 해법

The PRAM battery keeps your clock ticking! So yes a dead battery will cause it to lose the date & time.

Your display issue is more inline with old components in the display video circuitry. The electrolytic capacitors degrade over time and your system might have Capacitor Plague.

Do be careful! CRT circuits are high voltage and even when you turn the system off and unplug it the caps and CRT are still holding some serious power!

해당 답변은 도움이 되었습니까?

점수 2

댓글:

This model uses a 3.5 volt Lithium 1/2 AA battery. https://www.newark.com/lascar/batt-3v6/l...

의 답변

의견 추가하세요

귀하의 답변을 추가하십시오

Lia Tomlinson 가/이 대단히 고마워 할 것입니다.
조회 통계:

지난 24시간: 0

지난 7일: 0

지난 30일: 1

전체 시간: 57