LC in a coma...

[returningmacuser]

I have an original Macintosh LC that refuses to start up. Nothing displays, and the only thing that happens is a clicking coming from the power supply. I do not have any devices in the SCSI port that are causing this. All I did was open it up. I tried pulling out the 68030 accelerator card, and it still doesn't work. There is no gunk coming from any chips or circuts that I can see, or anything else.

I really wish it didn't have to come to this. Now both my color capable 68k macs are broken! :'(

 

[slomacuser]

replace PSU

 

[Gil]

Same exact thing that was wrong with mine.

 

[Scott Baret]

This is a pretty common problem with the old TDK power supplies, especially if your LC was a pull from a school computer lab (where PSUs suffer the most due to chronic use, especially since these computers used to be turned on and off every day back before sleep mode made its way onto desktops).

 

[returningmacuser]

Same exact thing that was wrong with mine.

I had a sneaking suspicion in the back of my mind that that was the problem.

 

[jhvaughan2]

Anyone know if LCIII supplies will work in LCs? I have two working LC III power supplies in my basement. I don't care to make any money on them, in fact I've been meaning to free/re/cycle them. If you think they will fit, and if you are willing to cover shipping (probably around 5$), send me your address and paypal email address and I'll have them to you next week.

 

[Gil]

Anyone know if LCIII supplies will work in LCs? I have two working LC III power supplies in my basement. I don't care to make any money on them, in fact I've been meaning to free/re/cycle them. If you think they will fit, and if you are willing to cover shipping (probably around 5$), send me your address and paypal email address and I'll have them to you next week.

Yes they do, that's how I'm using my LC (Recently got an LC III with working PS.)

The ONLY thing though, is the length of the wires that connect the PS to the logic board. Because the connections are in a different place on the logic board of the LC than the LC III, the connector BARELY fits onto the pins.

Or is it the other way around?

 

[Scott Baret]

The LC, LCII, LCIII, LCIII+, LC475, and Quadra 605 share the same power supply. If you can find the other brand besides TDK (the name escapes me but I know it has a sticker with green writing on it) you'll have a more reliable source.

It's also worth noting that Astec supplies should be avoided in SEs and IIcis (go for the Sony or GE, respectively).

 

[LCGuy]

IIRC the other brand is Delta. From what I've seen, you can usually identify a Delta PSU from the outside, as having a black power switch and AC inlet. TDKs have white.

 

[Scott Baret]

IIRC the other brand is Delta. From what I've seen, you can usually identify a Delta PSU from the outside, as having a black power switch and AC inlet. TDKs have white.

Yes, Delta is the one I was thinking of. I actually have seen at least one Delta with a white switch. They seemed to be used mostly on the later production pizza box machines, so you may have to swap a PSU with a Quadra 605 to get one.