A3000 and no signal with lcd

zimgr5 · 15 February 2009, 17:33

Recently I came across A3000 and try to test it .
I connected my LCD which is Samsung SyncMaster 173p through VGA but it seems that there is no signal, screen stays black.
Don't know but it's about refreshing frequencies ?

Anyone using LCD's with A3000 ?

Cheers.

alexh · 15 February 2009, 17:36

Most LCD monitors do not support an incoming signal with a vertical refresh rate of 50Hz (PAL).

You need to switch the Amiga to 60Hz (NTSC).

If you have REAL KS3.1 you can do this by holding down both mouse buttons on power on or after a reset and press space bar.

Otherwise you'll have to use an Amiga monitor or an A520 + TV to setup the default workbench screen mode to be NTSC.

tnt23 · 15 February 2009, 18:51

Is the scandoubler switch on the back of your 3000 set to ENABLED?

zimgr5 · 15 February 2009, 20:01

Quote:

Originally Posted by tnt23

Is the scandoubler switch on the back of your 3000 set to ENABLED?

Yep, but no effect.

AmigaFriend · 15 February 2009, 20:09

Alexh said it all.

LCD have problems operating at less than 60hz. Very few are capable.

Only Indivision is fully compatible with LCD. If you use (have) a CRT your problems are solved.

alexh · 15 February 2009, 22:02

It will take 30 seconds to switch to NTSC screen mode (60Hz) and everything will spark into life.

15 February 2009, 17:33	#1
zimgr5 Registered User Join Date: Jan 2009 Location: Dublin Posts: 35	A3000 and no signal with lcd Recently I came across A3000 and try to test it . I connected my LCD which is Samsung SyncMaster 173p through VGA but it seems that there is no signal, screen stays black. Don't know but it's about refreshing frequencies ? Anyone using LCD's with A3000 ? Cheers.

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15 February 2009, 17:36	#2
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	Most LCD monitors do not support an incoming signal with a vertical refresh rate of 50Hz (PAL). You need to switch the Amiga to 60Hz (NTSC). If you have REAL KS3.1 you can do this by holding down both mouse buttons on power on or after a reset and press space bar. Otherwise you'll have to use an Amiga monitor or an A520 + TV to setup the default workbench screen mode to be NTSC.

15 February 2009, 18:51	#3
tnt23 Registered User Join Date: Feb 2008 Location: Saint-Petersburg / Russia Posts: 324	Is the scandoubler switch on the back of your 3000 set to ENABLED?

15 February 2009, 20:09	#5
AmigaFriend Registered User Join Date: Sep 2008 Location: CLI Posts: 1,462	Alexh said it all. LCD have problems operating at less than 60hz. Very few are capable. Only Indivision is fully compatible with LCD. If you use (have) a CRT your problems are solved.

15 February 2009, 22:02	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	It will take 30 seconds to switch to NTSC screen mode (60Hz) and everything will spark into life.

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