27 February 2019, 20:50 | #1 |
Music lord
Join Date: Jun 2003
Location: Liverpool, UK
Age: 50
Posts: 630
|
A4000T won't boot
I switched on my A4000T for the first time in about 8 years. It powers on, but remains on the black screen. Physically, there doesn't seem to be anything wrong. A4000Ts have a lithium button battery, which is not prone to leakage like the others. All the capacitors look fine; it all looks just like it should. Of course, I don't really know what I'm looking for. Maybe something has leaked, but I can't see any evidence of that.
First thing I did was take all of the extra boards out. No change. Then I took out the SIMM. No change. I tried switching from the 040 board to my PPC board, still a black screen. I put the 040 back in and noticed that the power light flashes. It does 11 flashes, the last holds for longer than the others, like the following: X.X.X.X.X.X.X.X.X.X.XXXX....[repeat] Each flash is accompanied by a tiny click from the speaker. This only occurs with the 040 board in-place. With no CPU board or with no PPC board, there is a black screen but no flashing. Does anyone know what the flashing sequence means? Any thoughts? Last edited by FromWithin; 27 February 2019 at 21:20. |
27 February 2019, 22:55 | #2 |
Registered User
Join Date: Feb 2012
Location: United Kingdom
Posts: 3,175
|
I recall seeing somewhere that this could be due to chip ram. Have a look to see if any are failing to warm up. I'm not sure if piggy back method can be used to bypass this?
A faulty Angus can also do this on other Amigas although I think it usually shows green screen. |
28 February 2019, 13:58 | #3 |
Music lord
Join Date: Jun 2003
Location: Liverpool, UK
Age: 50
Posts: 630
|
When you say "warm up", what exactly do you mean?
Last edited by FromWithin; 28 February 2019 at 14:28. |
28 February 2019, 17:40 | #4 |
Registered User
Join Date: Feb 2012
Location: United Kingdom
Posts: 3,175
|
Literally put your finger on the chips to see if they heat up. Usually takes less than 1 min. Too hot could also point to faulty chip as well as cold chip. Just a crude way to test... you can get an idea of faulty one if others in same group appear 'different'
|
01 March 2019, 20:37 | #5 |
Music lord
Join Date: Jun 2003
Location: Liverpool, UK
Age: 50
Posts: 630
|
There doesn't seem to be any heating up on any of the chips.
|
01 March 2019, 20:50 | #6 |
Registered User
Join Date: Sep 2015
Location: London, UK
Posts: 414
|
Check the ROMs are seated properly. I've had similar symptoms in an A3000 and it turned out the ROMs were slightly unseated.
|
02 March 2019, 00:58 | #7 |
Registered User
Join Date: Dec 2015
Location: USA
Posts: 2,918
|
I've seen similar behavior when SCSI is not set up properly, either no or incorrect termination or some other misconfiguration.
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
A4000T won't boot with A4000T ROMs, but boots with A4000D ROMs | 8bitbubsy | support.Hardware | 15 | 29 March 2022 13:41 |
A4000T boot signals help needed | tbtorro | support.Hardware | 13 | 13 February 2016 09:06 |
A1200 won't boot | jimmer78 | support.Hardware | 6 | 09 February 2012 14:58 |
A4000T WB disks and Manual + Boot floppy for OS 3.9 installation | Kristian95 | request.Other | 4 | 27 February 2008 17:37 |
a4000t boot floppy? | tin | support.Hardware | 2 | 14 October 2004 20:03 |
|
|