Problem with my Amiga 500 (Yellow Screen, Reboot)

souls · 13 January 2012, 11:01

Hi,

recently i purchased an Amiga 500 from ebay (Kickrom 1.3, 512KB Ram). I already have an Amiga (also 500) with Kickrom 1.2.
However, the "new" has some issues. Some games/programs work as expected. Others however lead to a yellow screen and reboot while loading.

I have made a short video that illustrates the problem (watch the LEDs).

[ Show youtube player ]

I have already opened the amiga and checked for leaking parts, checked if some chips are loose, etc. Everything seems to be alright. There is one thing i noticed, when starting the workbench i get the notification: "no battery backed up clock has been found".
I thought that simply the battery is empty and that time settings are messed up. Could this be a part of the yellow screen problem?

Any help is appreciated! I really want to get this little box to run!

thanks

davideo · 13 January 2012, 11:54

A standard 500 does not have a battery backed up clock.

These are normally fitted to expansion RAM boards - have a look in the trapdoor underneath the Amiga. It may have on ewith a leaking battery.

Dave G

souls · 13 January 2012, 12:06

Quote:

Originally Posted by davideo

A standard 500 does not have a battery backed up clock.

These are normally fitted to expansion RAM boards - have a look in the trapdoor underneath the Amiga. It may have on ewith a leaking battery.

Dave G

Hi Dave, thanks for your reply. The model i have has not been upgraded so far (expansion slot under trap door is still empty).

source · 13 January 2012, 22:38

Have you tried the other power supply. The drive activity and failing supply may be too much. You get an undervolt. Themachine hangs.

lifeschool · 14 January 2012, 14:11

Yeah, this could either be caused by a bad capacitor on the motherboard (you may need to swap them around to see if it helps), or just as commonly happens if there is some kind of power supply problem. Sometimes there may be a short to the metal sheilding (usually if there are any pins sticking up from chips), or because of a dodgy trapdoor expension, but since these latter two are rather remote options given your config, I'd say try another power supply as your first priority.

13 January 2012, 11:01	#1
souls Registered User Join Date: Mar 2009 Location: Austria Age: 44 Posts: 27	Problem with my Amiga 500 (Yellow Screen, Reboot) Hi, recently i purchased an Amiga 500 from ebay (Kickrom 1.3, 512KB Ram). I already have an Amiga (also 500) with Kickrom 1.2. However, the "new" has some issues. Some games/programs work as expected. Others however lead to a yellow screen and reboot while loading. I have made a short video that illustrates the problem (watch the LEDs). [ Show youtube player ] I have already opened the amiga and checked for leaking parts, checked if some chips are loose, etc. Everything seems to be alright. There is one thing i noticed, when starting the workbench i get the notification: "no battery backed up clock has been found". I thought that simply the battery is empty and that time settings are messed up. Could this be a part of the yellow screen problem? Any help is appreciated! I really want to get this little box to run! thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Yellow Screen Amiga 500 with +512kb	Abelardator2	Hardware mods	19	25 June 2013 21:25
A4000 CSMK2 boot error (yellow+rainbow+reboot)	qq1975b	support.Hardware	1	30 October 2012 02:20
Need a Buster Chip! Yellow screen problem on my a4k	magnetic	support.Hardware	21	27 March 2011 23:08
Amiga 600 not booting... Yellow screen, and Red screen when turning PSU off	jbenam	support.Hardware	34	20 March 2011 22:10
yellow reboot	lost_loven	support.Hardware	3	28 June 2009 15:35

13 January 2012, 11:54	#2
davideo Amiga Tomcat Join Date: Sep 2007 Location: Boston Lincs Posts: 1,500	A standard 500 does not have a battery backed up clock. These are normally fitted to expansion RAM boards - have a look in the trapdoor underneath the Amiga. It may have on ewith a leaking battery. Dave G

13 January 2012, 22:38	#4
source Zone Friend Join Date: Jul 2005 Location: Toronto, Canada Posts: 734	Have you tried the other power supply. The drive activity and failing supply may be too much. You get an undervolt. Themachine hangs.

14 January 2012, 14:11	#5
lifeschool Local Moderator Join Date: Oct 2009 Location: Lancashire, UK Age: 48 Posts: 1,591	Yeah, this could either be caused by a bad capacitor on the motherboard (you may need to swap them around to see if it helps), or just as commonly happens if there is some kind of power supply problem. Sometimes there may be a short to the metal sheilding (usually if there are any pins sticking up from chips), or because of a dodgy trapdoor expension, but since these latter two are rather remote options given your config, I'd say try another power supply as your first priority.

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