Help! Green screen, then Black as midnight

Photon · 14 December 2006, 15:41

Got an A500, powered it up, booted fine, put in a kick 1.2 that I got (and yes I put it in the right way...), black screen...

OK, put the 1.3 back in, got green screen (indicating chip ram error), amiga resetted, got green screen, turned it off. Now when I turn it on all I get is a black screen.

It's almost as if there's no power, but I measured them - 5v, +12 and -12 are all good.

Help. :´(

Photon · 14 December 2006, 17:23

Re-seated all chips... the CPU 'felt' a little dodgy going in but it looks all right visuallly. Now I get continuous blinking, and black screen. So something changed. I suspect the CPU socket now.

But what does the continuous blinking indicate? Interval is 1 blink per second with no pauses. If it were just a few blinks it would be the keyboard but...

Photon · 14 December 2006, 18:36

Investigated the 68k socket... some klutz had been at the socket from the underside. Was a sweaty job resoldering the points on the mobo, argh. Works perfectly now. Remind me to buy a MIB A500 straight from the Commodore factory next time ;P

Zetr0 · 14 December 2006, 19:50

LOL

Glad you got it sorted out Photon!!!

killergorilla · 15 December 2006, 12:32

Midnight isn't actually that black here at the moment.

Photon · 15 December 2006, 12:38

hehe KG

Quote:

Originally Posted by Zetr0

LOL

Glad you got it sorted out Photon!!!

Well, I took the day off, so I slept in and I'm gonna have a soldering day today, I'm gonna try to finish a kickstart switch, a 50-pin IDC-to-25-pin DSUB SCSI adapter and mod my gamepads to be able switch between up=jump and fire C=jump... wish me luck

Photon · 15 December 2006, 14:49

Kickstart Switch done...check.

Photon · 15 December 2006, 17:49

Bah. When putting in the Kick Switch under the 040 board, its socket gave up for the final time. It was dodgy before, but now the board just springs out of the "between"-socket at one end. The socket is warped, too. Don't buy sockets that are solid in the middle! Removed the warped socket and inserted strip pins, 32 on each side, to compensate in height.

Still springs up, the pins on the underside of the 040 must have been inserted 20 or so times, thereby becoming "whittled" too thin.

On powerup boot seems normal until it hits light grey. Then nothing happens. So it's almost there but not quite...

Wish someone could make and sell two 68000 sockets connected by ribbon cable. But as it is, I will have to spend the evening doing my own. Bah.

musashi5150 · 15 December 2006, 19:09

Good luck getting it fixed - that's a great card you have there

Photon · 16 December 2006, 02:47

I've just christened my A500/040. It will from this moment on be called 'Millennium Falcon'. "She may not look like much, but she's got it where it counts. I've made a lot of special modification myself." (c) Han Solo

After cutting, stripping, putting solder on, and soldered 128 pin sockets, checking each point twice through to the pin tips that go in the mobo, as well as making sure there are no shorts, I plugged it in and it worked perfectly right off! Ahh.

http://hornet.homeftp.net/photon/amiga/Ribbon.jpg

The bits of green tape are to hold it temporarily to take the picture

Anyone know some good burn-in programs that test MIPS/MFLOPS, all memory etc? Might as well. Also pledge not to add any special modifications ever.

(btw. That pic should deter anyone from requesting my help in fixing their 040 hehe

Looks like bad soldering because the socket go shiny around the heated pins, but there are 0 dubious solder joints that can cause trouble in future. And it looks like the wires go this way and that, but they are evenly spaced with safe distance at the sockets. GND and +5 were soldered with a thicker wire; since the 68000 on the 040 board was connected to them it might rely on them when in 68000 mode.)

kriz · 16 December 2006, 04:36

Good work Photon!

Zetr0 · 16 December 2006, 13:54

Smooth Photon!!!

I am looking forward to seeing pics of it all completed and tested

)

for programs try

SysSpeed *free form aminet*

SysInfo is another.

Good work Photon, good work indeed.

14 December 2006, 15:41	#1
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	Help! Green screen, then Black as midnight Got an A500, powered it up, booted fine, put in a kick 1.2 that I got (and yes I put it in the right way...), black screen... OK, put the 1.3 back in, got green screen (indicating chip ram error), amiga resetted, got green screen, turned it off. Now when I turn it on all I get is a black screen. It's almost as if there's no power, but I measured them - 5v, +12 and -12 are all good. Help. :´(

16 December 2006, 02:47	#10
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	I've just christened my A500/040. It will from this moment on be called 'Millennium Falcon'. "She may not look like much, but she's got it where it counts. I've made a lot of special modification myself." (c) Han Solo After cutting, stripping, putting solder on, and soldered 128 pin sockets, checking each point twice through to the pin tips that go in the mobo, as well as making sure there are no shorts, I plugged it in and it worked perfectly right off! Ahh. http://hornet.homeftp.net/photon/amiga/Ribbon.jpg The bits of green tape are to hold it temporarily to take the picture Anyone know some good burn-in programs that test MIPS/MFLOPS, all memory etc? Might as well. Also pledge not to add any special modifications ever. (btw. That pic should deter anyone from requesting my help in fixing their 040 hehe Looks like bad soldering because the socket go shiny around the heated pins, but there are 0 dubious solder joints that can cause trouble in future. And it looks like the wires go this way and that, but they are evenly spaced with safe distance at the sockets. GND and +5 were soldered with a thicker wire; since the 68000 on the 040 board was connected to them it might rely on them when in 68000 mode.) Last edited by Photon; 16 December 2006 at 03:04.

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14 December 2006, 17:23	#2
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	Re-seated all chips... the CPU 'felt' a little dodgy going in but it looks all right visuallly. Now I get continuous blinking, and black screen. So something changed. I suspect the CPU socket now. But what does the continuous blinking indicate? Interval is 1 blink per second with no pauses. If it were just a few blinks it would be the keyboard but...

14 December 2006, 18:36	#3
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	Investigated the 68k socket... some klutz had been at the socket from the underside. Was a sweaty job resoldering the points on the mobo, argh. Works perfectly now. Remind me to buy a MIB A500 straight from the Commodore factory next time ;P

14 December 2006, 19:50	#4
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	LOL Glad you got it sorted out Photon!!!

15 December 2006, 12:32	#5
killergorilla Lesser Talent Join Date: Jan 2003 Location: UK Age: 42 Posts: 7,957	Midnight isn't actually that black here at the moment.

15 December 2006, 14:49	#7
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	Kickstart Switch done...check.

15 December 2006, 17:49	#8
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,655	Bah. When putting in the Kick Switch under the 040 board, its socket gave up for the final time. It was dodgy before, but now the board just springs out of the "between"-socket at one end. The socket is warped, too. Don't buy sockets that are solid in the middle! Removed the warped socket and inserted strip pins, 32 on each side, to compensate in height. Still springs up, the pins on the underside of the 040 must have been inserted 20 or so times, thereby becoming "whittled" too thin. On powerup boot seems normal until it hits light grey. Then nothing happens. So it's almost there but not quite... Wish someone could make and sell two 68000 sockets connected by ribbon cable. But as it is, I will have to spend the evening doing my own. Bah.

15 December 2006, 19:09	#9
musashi5150 move.w #$4489,$dff07e Join Date: Sep 2005 Location: Norfolk, UK Age: 42 Posts: 2,351	Good luck getting it fixed - that's a great card you have there

16 December 2006, 04:36	#11
kriz Junior Member Join Date: Sep 2001 Location: No(R)Way Age: 42 Posts: 3,222	Good work Photon!

16 December 2006, 13:54	#12
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Smooth Photon!!! I am looking forward to seeing pics of it all completed and tested ) for programs try SysSpeed free form aminet SysInfo is another. Good work Photon, good work indeed.

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