27 Jun
2023
27 Jun
'23
10:12 a.m.
On Tue, Jun 27, 2023, 12:34 PM Jon Elson via cctalk <cctalk(a)classiccmp.org
wrote:
On 6/27/23 09:42, Jonathan Katz via cctalk wrote:
I would plug it in to the same place it was working to confirm a
known-working supply source longer works. I'd this is not conveniently
possible try a plug that has zero load on it. Eliminate the new variable
(new socket in new location) before start changing caps like its a
home.computer. the RT has a sophisticated power supply. There may be
redundancy built in as well.
Bill
Hey folks,
Now that I'm done moving house I have time to wrench on the 6150.
Before moving it worked; you'd power it on, the LCD status countdown
would get to an OK value, but the CRT wasn't legible. I figured I'd be
wrenching on the CRT.
Instead, now when I power it on, it powers on for a second or two and
then shuts off. I'm assuming this indicates a short or power-draw
somewhere. I've reseated the CPU and RAM cards, the peripherals, and
unplugged the hard drives (2x ESDI) and floppy in case they had a
fault that was drawing too many amps and causing the power supply to
shut-down. I noticed nothing on the CPU or RAM boards (exploded caps,
etc.)
What should I look at next?