Black screen after a while

liviux76 · 21 February 2016, 21:49

Hello all,
I am facing a very annoying problem.
I have an A1200 Tower with a Blizzard 1260, a Fastata MKV and an Indivision MKII cr (plus some more).

Sometimes I get a black screen during the normal use of Workbench. It happens absolutely randomly, after a minute or after 30 minutes, sometimes even at boot I just get a black screen and "no signal" on screen.

I usually open the case, press the Indivision on Lisa, sometimes I even clean the contacts and I temporarily solve the issue... just until it happens again.
Any idea about what can cause this problem?

The card is a rev 1d4, recapped with time fixes and with E127C open and E127R close with a 10Ohm resistor. This has been done because I had glitches at boot with HighGFX at 1024x768 (the resolution I still use).

Daedalus · 22 February 2016, 09:59

It sounds like the Indivision is coming loose, probably as the Lisa chip warms up. Unfortunately the method of clipping a socket on over chips like that is never 100% as the chips aren't designed to be used like that, so you could have a slight tolerance issue. Are you sure it's seated on the chip properly? Is it slightly raised on one side? There could be a tiny lump of solder or a small component causing the socket to not fit exactly right, or possibly a cracked solder joint that becomes undone because of the heat and pressure.

liviux76 · 22 February 2016, 10:21

Hello Daedalus,
thanks for the hint... your explanation is certainly a possible cause.

To be honest, I noticed a small "issue" in the socket of the Indivision... it seems that the plastic between two pins is broken. Those pins are still straight, though, and when I put the Indy on Lisa it clicks well...

I will check better that part this evening and even the joints around Lisa. I had this issue a few months ago but after a cleaning of the mainboard and re-sitting of all expansions it seemed solved but now it has reappeared.

21 February 2016, 21:49	#1
liviux76 Registered User Join Date: Jan 2014 Location: BO/Italy Posts: 711	Black screen after a while Hello all, I am facing a very annoying problem. I have an A1200 Tower with a Blizzard 1260, a Fastata MKV and an Indivision MKII cr (plus some more). Sometimes I get a black screen during the normal use of Workbench. It happens absolutely randomly, after a minute or after 30 minutes, sometimes even at boot I just get a black screen and "no signal" on screen. I usually open the case, press the Indivision on Lisa, sometimes I even clean the contacts and I temporarily solve the issue... just until it happens again. Any idea about what can cause this problem? The card is a rev 1d4, recapped with time fixes and with E127C open and E127R close with a 10Ohm resistor. This has been done because I had glitches at boot with HighGFX at 1024x768 (the resolution I still use).

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Full-screen mode black screen with Default refresh rate	mark_k	support.WinUAE	4	16 February 2016 20:29
black screen	nice but stupid	support.Hardware	22	23 May 2014 12:04
[FOUND: PHANTASIE III!] 2D RPG game with map screen, "black background combat screen"	Artifex 28	Looking for a game name ?	1	22 May 2014 17:42
Black Screen	Neil79	project.ClassicWB	2	20 October 2013 20:28
Black screen in full screen but not full window Winuae all versions	Mixter	support.WinUAE	18	30 June 2013 00:45

22 February 2016, 09:59	#2
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	It sounds like the Indivision is coming loose, probably as the Lisa chip warms up. Unfortunately the method of clipping a socket on over chips like that is never 100% as the chips aren't designed to be used like that, so you could have a slight tolerance issue. Are you sure it's seated on the chip properly? Is it slightly raised on one side? There could be a tiny lump of solder or a small component causing the socket to not fit exactly right, or possibly a cracked solder joint that becomes undone because of the heat and pressure.

22 February 2016, 10:21	#3
liviux76 Registered User Join Date: Jan 2014 Location: BO/Italy Posts: 711	Hello Daedalus, thanks for the hint... your explanation is certainly a possible cause. To be honest, I noticed a small "issue" in the socket of the Indivision... it seems that the plastic between two pins is broken. Those pins are still straight, though, and when I put the Indy on Lisa it clicks well... I will check better that part this evening and even the joints around Lisa. I had this issue a few months ago but after a cleaning of the mainboard and re-sitting of all expansions it seemed solved but now it has reappeared.

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