🚀 go-pugleaf

In article <ant1812061cb=FPP@falkner.iconz.co.nz> falkner wrote:
> In article <48f449cb7dhbradley@argonet.co.uk> Harry Bradley
>        <URL:mailto:hbradley@argonet.co.uk> wrote:

>> I have a sudden flickering monitor problem over the whole screen. 
>> The monitor is an Iiyama Vision Master 17.
[snip]

> I have had this happen when I used an external disk drive unit
> for my A5000. The power supply in the monitor was upset by the
> deliberately large mains transformer I had put into my disk 
> drive unit.
[snip]

I had something similar with my Philips CM11342/20G monitor. Can't 
describe it exactly as it was 4-5 years ago. I gave it the occasional
hefty bash which solved the problem for a little while. This suggested
a bad contact of some kind.

I opened up my monitor and found half a dozen cold solder points on 
a small board close to the RGB socket. If necessary use a magnifying
glass. You will see a circular hair crack in the solder around the
wire end.

 WARNING!! DON'T TRY THIS AT HOME IF YOU DON'T KNOW WHAT YOU 
 ARE DOING.

 The Voltages inside are in the order of 25,000 Volts and can linger
 for a long time AFTER switching off. So rubber floormats and gloves
 MAY save your life. Sorry for sounding paranoid but I am not.

 �30 seems a reasonable price to pay to an Acorn dealer for peace 
 of mind.

* A good electrician is one that lives past retirement age ;_))

I took a 'fine point' soldering iron to it and it has been OK ever 
since, Uh .... except that the screen was now olive green instead of 
light grey. Palette colours 3 and 4. [1]
 
The only way I have ever managed to change the screen colours was to
fiddle with Desktop_SetPalette in !Boot but not very satisfactory.

Then in May 98 I took my machine to an BBC/Acorn/Amstrad repair
specialist in Enfield to replace the Monitor on/off button. I had
been wedging it for the last two years with a small screwdriver.

When I collected the machine a couple of hours later, the screen 
was its original grey colour. He said there was noyhing wrong with
my soldering but the colour guns on the Tube needed adjusting. Too
much green. Now, even if I had known, I would not have dared to get
close to it. He confirmed the voltages inside were around 25,000 V.

[1] I must have touched the gun adjustment controls by accident 
    when I opened it a few years ago.

The picture is now beautifully crisp. I had forgotten how it was 
supposed to look like.
* Build a system that can be used by fools and only a fool will want            to use it.

-- 
Reg Hems ZFC LXV3 \_
BBC B Micro Issue 3 \_
Atomwide Serial board \_
420/1-IDE-SCSI-ARM3-4Mb \_
USR Sportster 33.6-115200 \_
      reghems@argonet.co.uk |
Uploaded to news.dial.pipex.com on Sun,18 Apr 1999.17:37:17