Amiga 500 no video?

sjakie43 · 28 October 2010, 20:58

Hi Guys,

I did some checking and it seems that my Amiga 500 OCS
gives me no picture.....

I have checked connections,i have replaced the Paula chip and i have tried another 1084S monitor from my C64,still no picture.

The Amiga 500 itself seems to work just fine,floppy checks and my
A590 is booting up.

What can i Do?

Regards
Sjakie43

sjakie43 · 28 October 2010, 21:16

Last time i used my Amiga it was ok,didnt change anything,
It is standing on the same place,it hasnt moved at all.

I have also a replacement Amiga 500 but i am not sure if that one worked at all so thats no insurance.(no picture on this one either).

I want my amiga working!

Sjakie43

sjakie43 · 28 October 2010, 22:22

i Have checked 2 monitors(1084s),my modulator on the TV,
I have replaced CIA,VIDEO and PAULA.

I noticed though that 1 pin on the connection from Amiga to monitor
was bend,have put it straight but no difference.

So the only thing i can think of is that something broke when that Pin was bent.

Aaargh

Sjakie43

cpiac64 · 28 October 2010, 22:37

remove expansion and use another psu for test

sjakie43 · 28 October 2010, 23:04

I tried that and no difference....

cpiac64 · 28 October 2010, 23:39

connect a scart cable and test videocomposite

8bitbubsy · 29 October 2010, 06:46

Look around the motherboard for any burnt components, like resistors...
If you can't spot any, try letting the Amiga run for a while having the chassis on, then (while being sure you have no static electricity in your body) try to touch components around the video area to see if they are suspiciously warm - that can mean that the component is fried.

Another tip is to look for any dried solder joints on the IC sockets... Look on the socket itself and the solder pins on the bottom of the motherboard.

sjakie43 · 29 October 2010, 09:43

I will check the mobo and temp

Regards
Sjakie43

orange · 29 October 2010, 11:23

have you tried mono composite out?

sjakie43 · 29 October 2010, 13:16

Hi,

You mean from the modulator 1 (yellow)connector to scart?(and that to the TV?)

Still no picture.......

Sjakie43

sjakie43 · 29 October 2010, 14:18

As far as i can see there is a very faint signal far far away......

Its almost not visible on my telly,very very very far away it swirles
in a distance........

Sjakie43

orange · 29 October 2010, 17:30

try the one on Amiga, not on rf modulator. iirc its the first connector.

sjakie43 · 29 October 2010, 21:59

I've got picture !

But it's black&white ?

At least ive got something.......

So whats next then?

Sjakie43

orange · 29 October 2010, 22:06

that's normal, all A500 have black&white on that connector (including A500+ iirc).

check 23pin video connector again. which pin was bent?
er, gotta ask, are you sure monitor is set to RGB when using video conn?

sjakie43 · 29 October 2010, 22:31

Yes my monitor is set to rgb

Let me see which pin.....the below pin on the right side.
i just bent over the Amiga so i see it upside down.

if i would disconnect and turn the Amiga 9then the mono video is
on the right) and then its the left below pin.

Sjakie43

sjakie43 · 29 October 2010, 22:52

13GNDRTN

Digital Ground (for /XCLKEN) Don"t connect with pin 16-20

This one i guess....

Sjakie43

sjakie43 · 30 October 2010, 23:19

So my Amiga is quite useless now eh ?

Sjakie43

orange · 30 October 2010, 23:59

afaik, that pin is not important. monitors usually use analog R,G,B GND and some sync.

I'd check sync signals first. look at schematic and follow the signal path. also check the cable if you haven't already.

sjakie43 · 31 October 2010, 12:34

`Cable is ok,and the modulator did work a short time ago
so its def the 23 pin connector thats fails.

Thanx for your help Orange,maybe i will buy me a Nice Amiga
somewhere.(a 3000/4000 would be nice,even a 2000)

This Amiga is Done..........

Sjakie43

Jope · 31 October 2010, 13:07

The video hybrid might be the problem here.

28 October 2010, 20:58	#1
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	Amiga 500 no video? Hi Guys, I did some checking and it seems that my Amiga 500 OCS gives me no picture..... I have checked connections,i have replaced the Paula chip and i have tried another 1084S monitor from my C64,still no picture. The Amiga 500 itself seems to work just fine,floppy checks and my A590 is booting up. What can i Do? Regards Sjakie43

29 October 2010, 22:52	#16
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	13GNDRTNDigital Ground (for /XCLKEN) Don"t connect with pin 16-20 This one i guess.... Sjakie43

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28 October 2010, 21:16	#2
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	Last time i used my Amiga it was ok,didnt change anything, It is standing on the same place,it hasnt moved at all. I have also a replacement Amiga 500 but i am not sure if that one worked at all so thats no insurance.(no picture on this one either). I want my amiga working! Sjakie43

28 October 2010, 22:22	#3
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	i Have checked 2 monitors(1084s),my modulator on the TV, I have replaced CIA,VIDEO and PAULA. I noticed though that 1 pin on the connection from Amiga to monitor was bend,have put it straight but no difference. So the only thing i can think of is that something broke when that Pin was bent. Aaargh Sjakie43

28 October 2010, 22:37	#4
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	remove expansion and use another psu for test

28 October 2010, 23:04	#5
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	I tried that and no difference....

28 October 2010, 23:39	#6
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	connect a scart cable and test videocomposite

29 October 2010, 06:46	#7
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,715	Look around the motherboard for any burnt components, like resistors... If you can't spot any, try letting the Amiga run for a while having the chassis on, then (while being sure you have no static electricity in your body) try to touch components around the video area to see if they are suspiciously warm - that can mean that the component is fried. Another tip is to look for any dried solder joints on the IC sockets... Look on the socket itself and the solder pins on the bottom of the motherboard.

29 October 2010, 09:43	#8
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	I will check the mobo and temp Regards Sjakie43

29 October 2010, 11:23	#9
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	have you tried mono composite out?

29 October 2010, 13:16	#10
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	Hi, You mean from the modulator 1 (yellow)connector to scart?(and that to the TV?) Still no picture....... Sjakie43

29 October 2010, 14:18	#11
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	As far as i can see there is a very faint signal far far away...... Its almost not visible on my telly,very very very far away it swirles in a distance........ Sjakie43

29 October 2010, 17:30	#12
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	try the one on Amiga, not on rf modulator. iirc its the first connector.

29 October 2010, 21:59	#13
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	I've got picture ! But it's black&white ? At least ive got something....... So whats next then? Sjakie43

29 October 2010, 22:06	#14
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	that's normal, all A500 have black&white on that connector (including A500+ iirc). check 23pin video connector again. which pin was bent? er, gotta ask, are you sure monitor is set to RGB when using video conn?

29 October 2010, 22:31	#15
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	Yes my monitor is set to rgb Let me see which pin.....the below pin on the right side. i just bent over the Amiga so i see it upside down. if i would disconnect and turn the Amiga 9then the mono video is on the right) and then its the left below pin. Sjakie43

30 October 2010, 23:19	#17
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	So my Amiga is quite useless now eh ? Sjakie43

30 October 2010, 23:59	#18
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	afaik, that pin is not important. monitors usually use analog R,G,B GND and some sync. I'd check sync signals first. look at schematic and follow the signal path. also check the cable if you haven't already.

31 October 2010, 12:34	#19
sjakie43 DJ Join Date: Dec 2006 Location: Holland Age: 53 Posts: 445	`Cable is ok,and the modulator did work a short time ago so its def the 23 pin connector thats fails. Thanx for your help Orange,maybe i will buy me a Nice Amiga somewhere.(a 3000/4000 would be nice,even a 2000) This Amiga is Done.......... Sjakie43

31 October 2010, 13:07	#20
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,904	The video hybrid might be the problem here.

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