My A4000 dying or dead!

[gizz72]

Hi,

Yesterday, after browsing with my A4000-D on the internet when something happened(off-line)! While I was configuring a dial-up number with MiamiDX, just as I was about to click save, Software failure for no reason!
After a few seconds I clicked the mouse, it reboots to a Yellow screen. Then it restarts after 2~3ish seconds, steady Yellow screen again and again for a minute. I turned A4000 off. Switch it on again, yellow screen again.
So I took my screw driver, open my A4000 up, checked my A3640, and reseat the board, switch on and a blank screen(black) came up and dead silence. No disk and HDD activity, no ROM splash screen. Later, I Remove every card installed including floppy. No go! Same results!

Did I just done something wrong somewhere? Did I just witness my A4000 died(In denial)! Is there any hope for it? I felt the whole world came down on me! I hope you guys can tell me what to do after! Any suggestions would be really be helpful!!

Regards,

GiZz72

[Tension]

You just Lost

[gizz72]

(gasp)...........

[countzero]

yellow screen kinda reminds processor slot problem, but if you didn't touch your processor card lately, it's unlikely. so I'ld say it's the caps death.

[gizz72]

yellow screen kinda reminds processor slot problem, but if you didn't touch your processor card lately, it's unlikely. so I'ld say it's the caps death.

@countzero
I see, I know I had an A3630 lying around somewhere... If I can find that, would that help revive it? I don't mind if it's a '030. As long it's not the mobo caps that died.. and I have no way to replace caps since I don't have the tools to do it..

GiZz72

[sim085]

I do not know if this helps. I have an A500+ and had the yellow screen problem as well. Additionally the problem came out very similar to yours; I was playing a game and all of a sudden I everything freezed up and a software failure message came afterwards. When I restarted I had the yellow screen.

Thanks to rkauer I identified the problem with a fried buffer on the GVP HD8+ connected to my Amiga. I replaced this chip and now everything is working fine again.

This buffer was responsable to handle memory and on several websites I found out that yellow screen means a problem with memory. Therefore maybe you can try to remove any additional memroy you have and see how it goes.

Good Luck
Sim085

[Tahoe]

Hi,
Did I just done something wrong somewhere? Did I just witness my A4000 died(In denial)! Is there any hope for it? I felt the whole world came down on me! I hope you guys can tell me what to do after! Any suggestions would be really be helpful!!

I think we need a little more info on your A4000 set up.
What revision mainboard? Battery leaking?

Yellow screen is often chipram, in a 4000 this is a simm module. Try reseating, see if it helps. The machine now just giving you a black screen can mean the A3640 is not seated properly, you were actually better off when you still had yellow. Does the power led go from dimmed to bright?

[gizz72]

@everyone

Hi, Good news. After careful cleaning every last part. From the memory to A3640 and reseating everything in place all was fine. The only thing I overlooked from the beginning was unplugging my Keyboard. Doing so, I found the culprit! Which is kinda weird though. I switch A4000 on and She was alive!!
When I checked and clean the green plastics within the keyboard"matrix", there were some dirt that may have caused some shorting?? I'm not sure, how I could explain this but as soon as I clean everything, the A4000 is back up and now I'm writing this entry using IBrowse2.4. Thanks for the suggestions and tips.
Is it possible the keyboard may have caused this failure? Very odd..

@sim085
Yes, earlier I've cleaned and reseat the memory and A3640 sockets. No luck. Until today, I removed the rest like mouse and Keyboard.
@Tahoe
I've removed the leaking battery since I bought it 5 months ago. It's corroding the board badly.
My Mobo Revision is Rev 2 and the A3640 is Rev 3.1.

Thanks again...