Faulty A500 mobo?

JackTheKnife · 20 December 2008, 06:18

I think I have some kind of power issue or faulty mobo.

Most annoying symptom is some strange vision issues when floppy read/write something: [ Show youtube player ] - red color appear.

Another problems:
- random reboot
- power input problem (sometimes I need to move the PSU plug

to get Amiga working, other way I have onlu Capslock LED indicated, no power LED, no boot)
- I had to try Amiga Explorer and ADF Send Terminal - on both I can not do CTRL+C under CLI (WB 2.05) and I got dropped transfer (not full file, WB 1.3).

So are those issues can be fixed or it is a faulty mobo

rkauer · 20 December 2008, 07:38

Dying power supply, or an overloaded one.

Or the contacts on the female plug are wearing. Only swapping for a new plug to solve on this case. You can always swap the old weak PSU for a pc unit.

JackTheKnife · 20 December 2008, 15:58

How big PC unit I need to mod for Amiga? I think some kind of descriptions I will find on EAB Forum.

Also what about Amiga Explorer / ADF Send Terminal CTRL+C issue? Can I check somehow null-modem connection with another software?

hit · 20 December 2008, 16:17

no clue about the powersupply, but have a look here for a transfer tool disk:
http://wiki.abime.net/transfer:hombre

JackTheKnife · 20 December 2008, 16:41

I will try Hombre tomorrow. First I am going to check if null-modem cable has correct connections.

About PSU - I had try to find something on the forum but I can not. There are related topics but without description how to do an adapter

hit · 20 December 2008, 16:43

have a look here:
http://www.ianstedman.co.uk/Amiga/am...tml#ATXAdaptor

Edit: he also offers a ready to use adapter:
http://www.ianstedman.co.uk/Amiga/am...rder_page.html

JackTheKnife · 20 December 2008, 18:03

Beware of them: http://stores.ebay.com/Canada-Connection-Store they are selling not full null-modem wires.

I checedk it with this http://www.amigaforever.com/kb/13-105 and even PIN#1 is not connected to the PIN#6 and ending somewhere else on Amiga side. Canada Connection said that a cable form Amiga Forever is a custom null-modem not a regular one.

prowler · 20 December 2008, 18:08

Quote:

Originally Posted by JackTheKnife

Canada Connection said that a cable form Amiga Forever is a custom null-modem not a regular one.

Yes, that's right.

This link gives the full details, like you said:
http://www.amigaforever.com/kb/13-105

Best thing to do is make one yourself according to the schematic given there.

JackTheKnife · 20 December 2008, 18:14

So this is a special one and they sold me correct but not working with Amiga?

hit · 20 December 2008, 18:17

Quote:

Originally Posted by JackTheKnife

So this is a special one and they sold me correct but not working with Amiga?

yep, amiga and pc serial ports are not identical. or should i say not for 100%? at least i made a custom one ( as described at the amigaforever page). and this was working, while the pc based cable was not.

JackTheKnife · 20 December 2008, 18:19

Great

hit · 20 December 2008, 18:23

hehe, yeah, amigas are in many ways special, sometimes unfortunately

JackTheKnife · 20 December 2008, 23:32

Back to ATX PSU is it possible to connect A500 and A570 to one PSU (250W or more)? I checked http://www.ianstedman.co.uk/Amiga/am...tml#ATXAdaptor and it looks like is connected only to molex, so I have more then 6 which I can use. Am I correct?

prowler · 21 December 2008, 00:07

Quote:

Originally Posted by JackTheKnife

Back to ATX PSU is it possible to connect A500 and A570 to one PSU (250W or more)? I checked http://www.ianstedman.co.uk/Amiga/am...tml#ATXAdaptor and it looks like is connected only to molex, so I have more then 6 which I can use. Am I correct?

Yes, Jack, you are right!

(Conditional on you not overloading the PSU.

)

JackTheKnife · 21 December 2008, 02:13

Does anybody know how called this power plug on Amiga side? Or maybe where I can buy it?

Thanks again

prowler · 21 December 2008, 02:34

Quote:

Originally Posted by JackTheKnife

Does anybody know how called this power plug on Amiga side? Or maybe where I can buy it?

I got one for my A1200 from AmigaDeals:
http://www.amigadeals.co.uk

It was just a lead which had been ripped from a non-working A1200 PSU. I can't remember what they called it ATM. I'll find my receipt later and let you know, but I'm not sure if the A500 has the same power plug as the A1200.

rkauer · 21 December 2008, 04:18

Just FYI, any working AT/ATX power supply will be more than enough to run an Amiga, even an expanded one.

AT/ATX "meager" PSU are at least 85W (the double of the most powerful original Amiga).

prowler · 21 December 2008, 11:36

@JackTheKnife:

The part described above which I bought from AmigaDeals for my A1200 was described as a "Power Supply Connector and Lead". Cost was 5 UKP.

AmigaDeals often sells these sort of parts and their stock is always changing, so keep an eye on their site - and good luck!

prowler

[Edit] I've just had a look at the AmigaDeals site in the Amiga Hardware section. They have a heavy duty 60 Watt A500 type PSU which they describe as "for any Amiga", so it looks like the power plugs are all the same! They have no separate PSU leads available ATM, though.

21 December 2008, 11:36	#18
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	@JackTheKnife: The part described above which I bought from AmigaDeals for my A1200 was described as a "Power Supply Connector and Lead". Cost was 5 UKP. AmigaDeals often sells these sort of parts and their stock is always changing, so keep an eye on their site - and good luck! prowler [Edit] I've just had a look at the AmigaDeals site in the Amiga Hardware section. They have a heavy duty 60 Watt A500 type PSU which they describe as "for any Amiga", so it looks like the power plugs are all the same! They have no separate PSU leads available ATM, though. Last edited by prowler; 21 December 2008 at 20:51.

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20 December 2008, 06:18	#1
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Faulty A500 mobo? I think I have some kind of power issue or faulty mobo. Most annoying symptom is some strange vision issues when floppy read/write something: [ Show youtube player ] - red color appear. Another problems: - random reboot - power input problem (sometimes I need to move the PSU plug to get Amiga working, other way I have onlu Capslock LED indicated, no power LED, no boot) - I had to try Amiga Explorer and ADF Send Terminal - on both I can not do CTRL+C under CLI (WB 2.05) and I got dropped transfer (not full file, WB 1.3). So are those issues can be fixed or it is a faulty mobo

20 December 2008, 07:38	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Dying power supply, or an overloaded one. Or the contacts on the female plug are wearing. Only swapping for a new plug to solve on this case. You can always swap the old weak PSU for a pc unit.

20 December 2008, 15:58	#3
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	How big PC unit I need to mod for Amiga? I think some kind of descriptions I will find on EAB Forum. Also what about Amiga Explorer / ADF Send Terminal CTRL+C issue? Can I check somehow null-modem connection with another software?

20 December 2008, 16:17	#4
hit Registered User Join Date: Jun 2008 Location: planet earth Posts: 1,115	no clue about the powersupply, but have a look here for a transfer tool disk: http://wiki.abime.net/transfer:hombre

20 December 2008, 16:41	#5
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	I will try Hombre tomorrow. First I am going to check if null-modem cable has correct connections. About PSU - I had try to find something on the forum but I can not. There are related topics but without description how to do an adapter

20 December 2008, 16:43	#6
hit Registered User Join Date: Jun 2008 Location: planet earth Posts: 1,115	have a look here: http://www.ianstedman.co.uk/Amiga/am...tml#ATXAdaptor Edit: he also offers a ready to use adapter: http://www.ianstedman.co.uk/Amiga/am...rder_page.html

20 December 2008, 18:03	#7
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Beware of them: http://stores.ebay.com/Canada-Connection-Store they are selling not full null-modem wires. I checedk it with this http://www.amigaforever.com/kb/13-105 and even PIN#1 is not connected to the PIN#6 and ending somewhere else on Amiga side. Canada Connection said that a cable form Amiga Forever is a custom null-modem not a regular one.

20 December 2008, 18:14	#9
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	So this is a special one and they sold me correct but not working with Amiga?

20 December 2008, 18:19	#11
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Great

20 December 2008, 18:23	#12
hit Registered User Join Date: Jun 2008 Location: planet earth Posts: 1,115	hehe, yeah, amigas are in many ways special, sometimes unfortunately

20 December 2008, 23:32	#13
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Back to ATX PSU is it possible to connect A500 and A570 to one PSU (250W or more)? I checked http://www.ianstedman.co.uk/Amiga/am...tml#ATXAdaptor and it looks like is connected only to molex, so I have more then 6 which I can use. Am I correct?

21 December 2008, 02:13	#15
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Does anybody know how called this power plug on Amiga side? Or maybe where I can buy it? Thanks again

21 December 2008, 04:18	#17
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Just FYI, any working AT/ATX power supply will be more than enough to run an Amiga, even an expanded one. AT/ATX "meager" PSU are at least 85W (the double of the most powerful original Amiga).

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