A500 not showing colour

01 April 2006, 22:18

My A500 only shows monochrome picture on my tv. I am using the A520 plugged into the RGB port, and an RF cablefrom the A520 to TV.

Any idea what could be wrong, and how to fix it to get a colour picture on the TV?

Jope · 03 April 2006, 11:33

The A520 can be broken or the TV is not tuned correctly.

03 April 2006, 12:49

I have tried it on two TV's in my house, bothe get a nice crisp picture, nice sound, but no colour!
I guess the A520 must be broken :/
Thanks for the info.

Galahad/FLT · 03 April 2006, 12:56

Check the pins in the socket for TV/Monitor on the back of the Amiga. Sometimes one of the pins gets pushed in through lots of use.

andreas · 03 April 2006, 13:35

Yep, I'd wager is the connector or just the cable that's broken.
Mine is unstable too; you can choose between greenish-purple, dark-yellow and whatnot ...

After various angles tried, you sometimes are the winner, having standard white on blue (wow

)

04 April 2006, 16:17

As far as I can tell the pins are fine, and wiggling, jiggling and wobbling the connections don't make a difference.
At one point I did see a flash of blue, or that could have been my eyes going funny from being too close to the TV

Any more ideas?

Jope · 05 April 2006, 14:06

Also try connecting the composite connector on the A520 to the av in of your TV, if that doesn't show colour either, you'll probably have to get a new modulator.

Overdoc · 05 April 2006, 14:46

The A-520 needs 5V, 12V and I think -12V, too. Don't have schematics right here, but I know if the 12V or -12V are missing you don't get any colour.
I have had this happen several times, and in most cases it was just a broken solder joint on the connector of the A-520's pcb.
If you move the A-520 up and done a little bit while the Amiga is running, does it show colour, then ?
You can just open the A-520 by pulling off the upper case (there are no screws), then remove 2 screws on the pcb, turn it upside down and resolder all solder joint on the connector.

Hope that helps

Jope · 06 April 2006, 09:39

Be careful when opening the A520, it's very easy to break the fastening rods that connect the top and bottom halves together. The rods of the bottom half go into holes in the top case and friction holds the whole thing together.

Prise it open from all edges evenly.. It's very stiff at first, so you need to use some force but if you overdo it, you'll end up opening one side too far and you will snap the rods.

coze · 07 April 2006, 14:47

I hope you did't get that modulator from the US. It may be an NTSC modulator, which will give you a BW screen on a PAL tv (I'm a PAL guy living in an NTSC country so the first thing that came to my mind was this.)

alexh · 07 April 2006, 14:53

You not got a SCART socket on your TV? Get a SCART cable... it will give you a much better picture.

EmuChicken · 29 August 2006, 10:42

Theres a TINY switch next to the modulator port, try switching this over

01 April 2006, 22:18	#1
Traquer Posts: n/a	A500 not showing colour My A500 only shows monochrome picture on my tv. I am using the A520 plugged into the RGB port, and an RF cablefrom the A520 to TV. Any idea what could be wrong, and how to fix it to get a colour picture on the TV?

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03 April 2006, 11:33	#2
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,885	The A520 can be broken or the TV is not tuned correctly.

03 April 2006, 12:49	#3
Traquer Posts: n/a	I have tried it on two TV's in my house, bothe get a nice crisp picture, nice sound, but no colour! I guess the A520 must be broken :/ Thanks for the info.

03 April 2006, 12:56	#4
Galahad/FLT Going nowhere Join Date: Oct 2001 Location: United Kingdom Age: 50 Posts: 9,015	Check the pins in the socket for TV/Monitor on the back of the Amiga. Sometimes one of the pins gets pushed in through lots of use.

03 April 2006, 13:35	#5
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Yep, I'd wager is the connector or just the cable that's broken. Mine is unstable too; you can choose between greenish-purple, dark-yellow and whatnot ... After various angles tried, you sometimes are the winner, having standard white on blue (wow )

04 April 2006, 16:17	#6
Traquer Posts: n/a	As far as I can tell the pins are fine, and wiggling, jiggling and wobbling the connections don't make a difference. At one point I did see a flash of blue, or that could have been my eyes going funny from being too close to the TV Any more ideas?

05 April 2006, 14:06	#7
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,885	Also try connecting the composite connector on the A520 to the av in of your TV, if that doesn't show colour either, you'll probably have to get a new modulator.

05 April 2006, 14:46	#8
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	The A-520 needs 5V, 12V and I think -12V, too. Don't have schematics right here, but I know if the 12V or -12V are missing you don't get any colour. I have had this happen several times, and in most cases it was just a broken solder joint on the connector of the A-520's pcb. If you move the A-520 up and done a little bit while the Amiga is running, does it show colour, then ? You can just open the A-520 by pulling off the upper case (there are no screws), then remove 2 screws on the pcb, turn it upside down and resolder all solder joint on the connector. Hope that helps

06 April 2006, 09:39	#9
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,885	Be careful when opening the A520, it's very easy to break the fastening rods that connect the top and bottom halves together. The rods of the bottom half go into holes in the top case and friction holds the whole thing together. Prise it open from all edges evenly.. It's very stiff at first, so you need to use some force but if you overdo it, you'll end up opening one side too far and you will snap the rods.

07 April 2006, 14:47	#10
coze hastala vista winny vista Join Date: Feb 2006 Location: mt fuji Age: 46 Posts: 1,335	I hope you did't get that modulator from the US. It may be an NTSC modulator, which will give you a BW screen on a PAL tv (I'm a PAL guy living in an NTSC country so the first thing that came to my mind was this.)

07 April 2006, 14:53	#11
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,432	You not got a SCART socket on your TV? Get a SCART cable... it will give you a much better picture.

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29 August 2006, 10:42	#12
EmuChicken Senior Member Join Date: Jul 2004 Location: Nagoya, Japan (moved!) Age: 41 Posts: 746	Theres a TINY switch next to the modulator port, try switching this over