A1200 flickering picture

sdaonline · 03 September 2005, 05:11

On my newly acquired A1200, the picture flickers slightly when only playing games. It's in bars across the screen, on RF and Scart. The system has a HD, when it's disconnected it's still like it. Could it be because it's running on an A600 PSU rather than an A1200 PSU?

Bloodwych · 03 September 2005, 11:36

My Amiga 1200 suffers from the same thing. It's a bug in the very first A1200's and a resistor fix is available on Aminet:

http://de.aminet.net/aminet/aminet/h...lickfix.readme

http://de.aminet.net/aminet/aminet/h...k/flickfix.lha

sdaonline · 04 September 2005, 06:28

Thanks for the solution, but it looks a bit too soldery for me!

I'll try and track down the parts.

BarrySWE · 23 September 2005, 16:51

what motherboard rev has this problem?
My Amiga 1200T screen flicker when loads from hd , cdrom or floppy.. and in games...

Bloodwych · 23 September 2005, 21:56

What ever revision the very first A1200 motherboard was I guess, as I was among the very first people in the UK to get an A1200HD.

Sounds like you have the same issue - I wouldn't call it flicker however. Whenever the CPU is under load the screen suffers slight interference in the background. I've learnt just to ignore it.

I'm actually quite surprised my Amiga is still going after all these years, especially considering the countless hours I've had this thing running! So the first revisions aren't all that bad! Respect!

BarrySWE · 23 September 2005, 23:36

i better try that resistor trick then =)

killergorilla · 24 September 2005, 00:55

You fancy shortening your signature a bit?

It's massively long!

BarrySWE · 24 September 2005, 09:54

Quote:

Originally Posted by killergorilla

You fancy shortening your signature a bit?

It's massively long!

*DONE*

but, anyone on the forum have done this?

killergorilla · 24 September 2005, 11:41

Ah that's a bit better

Thanks!

BarrySWE · 24 September 2005, 15:51

No one on the forum done this "trick"?

BarrySWE · 24 September 2005, 16:14

I need help to get the right component, i will do this trick..
can anyone post a link to the correct component on elfa or something....
please..
Barry.

what is CAPITANCE on swedish anyway?

AMIGAZ · 24 September 2005, 16:34

Have to type this in Swedish: tror det är en kondensators kapacitans mätt i mikrofarad.
http://faktabanken.nu/kondensatorer.htm

BarrySWE · 24 September 2005, 17:04

Quote:

Originally Posted by AMIGAZ

Have to type this in Swedish: tror det är en kondensators kapacitans mätt i mikrofarad.
http://faktabanken.nu/kondensatorer.htm

Maybe ELFA can help me if i post the picture to them?

AMIGAZ · 24 September 2005, 17:19

Yeah, if someone can help you it is them.

BarrySWE · 24 September 2005, 17:25

http://home.comcast.net/~jartz/amiga/flicker_fix.html

LOOK!!!

AMIGAZ · 24 September 2005, 17:27

Quote:

Originally Posted by BarrySWE

http://home.comcast.net/~jartz/amiga/flicker_fix.html

LOOK!!!

uhhh....cool

What are you waiting for? do that hardware hack now and get your A1200 going

BarrySWE · 24 September 2005, 18:20

Wanna fix it NOW!! :-)

Solder stuff togheter is SO FUNNY!

AMIGAZ · 24 September 2005, 18:39

Have to admit soldering these tiny things is scary

I'm an outboard engine mechanic but I still think soldering small stuff like this is quite tricky..have managed to replace the battery on my A4000D but it didn't make a difference since the clock circuits where dead anyway...killed by acid

AMIGAZ · 24 September 2005, 18:40

Had this flicker problem on my first A1200 but never solved..I learnt to live with it.
I read in Datormagazin about the problem and that people should fix it as a warranty issue but it looks like it didn't work out so well

BarrySWE · 24 September 2005, 18:46

Quote:

Originally Posted by AMIGAZ

Have to admit soldering these tiny things is scary

I'm an outboard engine mechanic but I still think soldering small stuff like this is quite tricky..have managed to replace the battery on my A4000D but it didn't make a difference since the clock circuits where dead anyway...killed by acid

I have solder my PSX multix chip, and that was a bit scary.. i have the first chip with 10+ solder point.. atleast..

so this 2 points can't be to hard for me ;-)
I better go shit before i begin, so i don't shit in my pants of nervosite..

03 September 2005, 05:11	#1
sdaonline Registered User Join Date: Jun 2004 Location: Skegness, UK Age: 37 Posts: 16	A1200 flickering picture On my newly acquired A1200, the picture flickers slightly when only playing games. It's in bars across the screen, on RF and Scart. The system has a HD, when it's disconnected it's still like it. Could it be because it's running on an A600 PSU rather than an A1200 PSU?

23 September 2005, 16:51	#4
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	what motherboard rev has this problem? My Amiga 1200T screen flicker when loads from hd , cdrom or floppy.. and in games... Last edited by BarrySWE; 23 September 2005 at 21:08.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
A1200 RGB picture flashing	Old Fool	support.Hardware	1	21 November 2012 00:31
No picture from Indivision (A1200) on LCD	jman	support.Hardware	1	19 November 2011 21:45
Flickering/discoloured picture	amigagav	support.Hardware	0	15 April 2011 21:00
Looking for an aga demo that has a1200 motherboard picture	ElectroBlaster	request.Demos	4	29 January 2011 22:44
Need A Clean A1200 Picture, Non Copyright	Loedown	request.Other	10	17 December 2009 15:16

03 September 2005, 11:36	#2
Bloodwych Moderator Join Date: Jun 2001 Location: I'm behind you! Posts: 3,763	My Amiga 1200 suffers from the same thing. It's a bug in the very first A1200's and a resistor fix is available on Aminet: http://de.aminet.net/aminet/aminet/h...lickfix.readme http://de.aminet.net/aminet/aminet/h...k/flickfix.lha

04 September 2005, 06:28	#3
sdaonline Registered User Join Date: Jun 2004 Location: Skegness, UK Age: 37 Posts: 16	Thanks for the solution, but it looks a bit too soldery for me! I'll try and track down the parts.

23 September 2005, 21:56	#5
Bloodwych Moderator Join Date: Jun 2001 Location: I'm behind you! Posts: 3,763	What ever revision the very first A1200 motherboard was I guess, as I was among the very first people in the UK to get an A1200HD. Sounds like you have the same issue - I wouldn't call it flicker however. Whenever the CPU is under load the screen suffers slight interference in the background. I've learnt just to ignore it. I'm actually quite surprised my Amiga is still going after all these years, especially considering the countless hours I've had this thing running! So the first revisions aren't all that bad! Respect!

23 September 2005, 23:36	#6
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	i better try that resistor trick then =)

24 September 2005, 00:55	#7
killergorilla Lesser Talent Join Date: Jan 2003 Location: UK Age: 42 Posts: 7,957	You fancy shortening your signature a bit? It's massively long!

24 September 2005, 11:41	#9
killergorilla Lesser Talent Join Date: Jan 2003 Location: UK Age: 42 Posts: 7,957	Ah that's a bit better Thanks!

24 September 2005, 15:51	#10
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	No one on the forum done this "trick"?

24 September 2005, 16:14	#11
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	I need help to get the right component, i will do this trick.. can anyone post a link to the correct component on elfa or something.... please.. Barry. what is CAPITANCE on swedish anyway?

24 September 2005, 16:34	#12
AMIGAZ Amiga-Mad Join Date: Oct 2004 Location: Sweden Age: 47 Posts: 1,291	Have to type this in Swedish: tror det är en kondensators kapacitans mätt i mikrofarad. http://faktabanken.nu/kondensatorer.htm

24 September 2005, 17:19	#14
AMIGAZ Amiga-Mad Join Date: Oct 2004 Location: Sweden Age: 47 Posts: 1,291	Yeah, if someone can help you it is them.

24 September 2005, 17:25	#15
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	http://home.comcast.net/~jartz/amiga/flicker_fix.html LOOK!!!

24 September 2005, 18:20	#17
BarrySWE Zone Friend Join Date: Sep 2005 Location: Sweden Age: 46 Posts: 404	Wanna fix it NOW!! :-) Solder stuff togheter is SO FUNNY!

24 September 2005, 18:39	#18
AMIGAZ Amiga-Mad Join Date: Oct 2004 Location: Sweden Age: 47 Posts: 1,291	Have to admit soldering these tiny things is scary I'm an outboard engine mechanic but I still think soldering small stuff like this is quite tricky..have managed to replace the battery on my A4000D but it didn't make a difference since the clock circuits where dead anyway...killed by acid

24 September 2005, 18:40	#19
AMIGAZ Amiga-Mad Join Date: Oct 2004 Location: Sweden Age: 47 Posts: 1,291	Had this flicker problem on my first A1200 but never solved..I learnt to live with it. I read in Datormagazin about the problem and that people should fix it as a warranty issue but it looks like it didn't work out so well

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)