A500 Weird Switch

[Super TWiT]

My A500 came in the mail today, and it seems to be working great but has a few oddities. The biggest of these is a strange switch that is installed on the front of the computer above the keyboard. It seems to have no purpose. Also, when plugging it into the TV, there is a loud humming noise coming from it. To top it all off, the trapdoor cover is missing. Mainly my confusion comes from the switch. Any ideas?

[odin]

Open up the case and find out. Is it marked magic/more magic? =) Most likely a ROM switcher er..switch.

[save2600]

Open up the case and find out. Is it marked magic/more magic? =) Most likely a ROM switcher er..switch.

Magic/more Magic... LOL!  

Probably a ROM switcher, but maybe a sound filter switch? Does the power light dim or
go out when you flick the switch?

If its a Kickstart ROM switcher, you need to turn the machine off and boot again in order
to notice a difference (after you've flicked). You might have 1.3 and 2.04 in there. Unlikely
it was upgraded to 3.1 without the seller mentioning it.

[orange]

you shouldn't use it while Amiga is powered on, it might damage something. it could be 512K RAM on/off, if there is such expansion.
the only other thing that comes to mind is PAL/NTSC switch..

[Super TWiT]

I thought it might be a rom switcher too, but after starting it, flicking it, and starting it again it still displays ver. 1.3. Are these things hard to take apart. Maybe I should just get in there and see if its wired.

[bm07]

Did you get this from ebay?  I saw one recently that had a weird switch and an "ICD" sticker on it... if you got this one it maybe it is an ICD flicker fixer or accelerator?

[Super TWiT]

I did infact get this from ebay, and it does say ICD on it. So you think the switch may be to a flicker fixer? I noticed the trap door cover was ripped off, so I think if it had one of these it was probably removed and sold sold separately.

[bm07]

I did infact get this from ebay, and it does say ICD on it. So you think the switch may be to a flicker fixer? I noticed the trap door cover was ripped off, so I think if it had one of these it was probably removed and sold sold separately.

Might be an AdSpeed:
http://www.amiga-hardware.com/showhardware.cgi?HARDID=73

[Super TWiT]

bm07 I congratulate you. After opening up the Amiga it turns out it was in fact an adspeed cpu upgrade. They must have literally drilled a hole in the top of the case to put that switch in! Thats what I call talent.