Macintosh LC

[yetanotherpunte]

Hi guys my macintosh LC makes a bit of a high pitched noise when i turn it on

any ideas as to what this could be?

Pictures of it can be found here - http://cgi.ebay.co.uk/ws/eBayISAPI....8458&ssPageName=STRK:MESELX:IT#ht_1190wt_1141

 

[teleromeo]

A cheap trick that solves many problems is to replace the backup battery.

 

[MacTech68]

Yup. Leaking Aluminium Electrolytic Capacitors on the motherboard (sample picture only).

Replace them with Tantalum Electrolytics or disconnect the speaker. If you don't replace the capacitors, eventually they will corrode tracks on the motherboard (if they haven't started already).

 

[chrismacguy]

Yup. Leaking Aluminium Electrolytic Capacitors on the motherboard (sample picture only).

Replace them with Tantalum Electrolytics or disconnect the speaker. If you don't replace the capacitors, eventually they will corrode tracks on the motherboard (if they haven't started already).

A slight warning about the caps replacement - Id recommend doing it carefully, you really dont want to ruin the board if you slip. Also check PDS slots still work post-op if/when you replace them

 

[MacTech68]

A slight warning about the caps replacement - Id recommend doing it carefully, you really dont want to ruin the board if you slip. Also check PDS slots still work post-op if/when you replace them

I agree, chrismacguy. I should have said that removing them isn't particularly easy. Nor hand soldering tanalum caps. Experience is very handy. Too much heat and you can lift tracks. Too little heat and you can rip tracks from the board.