If you disconnect the power supply from the motherboard, disks, etc, does it still pop? If so -> bad power supply. If not, reconnect one at a time and see if it is load based (eg each of them connected alone causes it). If it is purely load based, then it's a bad ps). If there's one thing that causes it to pop, there's an issue there. If it is the mobo, you might also try w/o the VR201 connected, since if that's pulling too much power, it can cause a PS overload (though I've never had this issue, I've read about it years ago).
Warner On Tue, Mar 5, 2019 at 2:56 PM Alan Perry <ape...@snowmoose.com> wrote: > OK, got back to this ... > > Plugged in the Rainbow 100. Flipped the power switch. No LEDs lit. > > There is a white circuit breaker on the power supply. When I switch on the > power, it pops out. I switch off the power, reset the breaker, switch on > the power and it pops out again. > > alan > > On 3/1/19 2:32 PM, Warner Losh wrote: > > Since you don't hear the gears grinding in the rx-50, that's a failure > fairly early on. The LEDs in the back of the case will tell you something. > There's a table for LED codes in the Rainbow manuals somewhere. If NO LEDs > are on, that tells you something too (they all light up on application of > power). > > I've had my rainbow for 30 years, and haven't had to deal with bad caps in > the power supply, but I've also gone as long as a decade with the Rainbow > in a box... And now I have 4 of them (2As and 2Bs).... > > Warner > > On Fri, Mar 1, 2019 at 3:13 PM Alan Perry <ape...@snowmoose.com> wrote: > >> I will look at that when I get back home after the weekend. >> >> On Mar 1, 2019, at 2:01 PM, Warner Losh <i...@bsdimp.com> wrote: >> >> >> >> On Fri, Mar 1, 2019 at 2:56 PM Alan Perry via cctech < >> cct...@classiccmp.org> wrote: >> >>> Initially it booted and ran for a while until I switched it off. >>> >>> The last time it responded to the power switched, components powered up >>> and the FDD started operating. Then suddenly everything stopped like the >>> plug had been pulled. >>> >>> Now it does nothing (apparent) when it is switched on. >>> >> >> The rainbow has a number of LEDs in the back that it frobs while >> booting... Do any of them light up? >> >> Warner >> >> >>> alan >>> >>> > On Mar 1, 2019, at 1:44 PM, dwight <dkel...@hotmail.com> wrote: >>> > >>> > Maybe I need a little clearification. >>> > When you turn the switches off, it boots? >>> > Dwight >>> > >>> > >>> > From: cctech <cctech-boun...@classiccmp.org> on behalf of Alan Perry >>> via cctech <cct...@classiccmp.org> >>> > Sent: Friday, March 1, 2019 1:35 PM >>> > To: Ethan Dicks >>> > Cc: General Discussion: On-Topic Posts >>> > Subject: Re: Rainbow 100 PSU capacitor list >>> > >>> > >>> > >>> > > On Mar 1, 2019, at 7:52 AM, Ethan Dicks <ethan.di...@gmail.com> >>> wrote: >>> > > >>> > > On Wed, Feb 27, 2019 at 1:21 PM Alan Perry via cctech >>> > > <cct...@classiccmp.org> wrote: >>> > >> Hi, >>> > >> >>> > >> I think that I need to re-cap the power supply in a Rainbow 100. >>> Does >>> > >> anyone here know if anyone has put together a list of capacitors >>> used in >>> > >> the power supply that I can use to order parts? >>> > > >>> > > I don't have a list (I just got a pair of Rainbows last month) but >>> > > given the era of manufacture, I'd be looking for Rifa EMI filter caps >>> > > by the power inlet. I've had those fail in BA23 cabinets and in a >>> > > Commodore D9060 hard drive, and a TRS-80 Model 4. >>> > >>> > Thanks. When I first got the Rainbow, I asked here about what to look >>> for before powering it up and was told about Rifa caps and what look/listen >>> for. >>> > >>> > I eventually threw caution to the wind and just powered it up and I >>> ran it for 15-20 minutes. The PVA in the monitor was really cloudy, so I >>> didn’t use the system anymore until I removed the PVA over Christmas. I was >>> testing everything after that and the system was booting up when the power >>> all switched off like it had been unplugged. >>> > >>> > alan >>> > >>> > >>> > > >>> > > This is totally different than failing/bulging electrolytics. >>> > > >>> > > -ethan >>> > >>> >> >
