[Coco] Can I fix an old monitor?

[Walter Zambotti]

The symptom it displays is a little odd.

It has trouble turning on and trouble coming back out of sleep mode.

I can use it for hours and hours but go away for twenty minutes and
it wont redisplay.  I can see it is trying because I get some screen
flashing.

And sometimes after several flashes it might come back on.

But once it's on its stays on until I stop using it a let it sleep.

Walter

On 2020-04-27 23:09, Arthur Flexser wrote:
> Two things that come to mind:
>
> First, look for capacitors that are swollen or leaky.  Though I don't know
> that the symptom there would be dying after a few minutes rather than just
> not working at all.
>
> The dying after a few minutes sounds more characteristic of a chip
> overheating.  Carefully feel if any chip has gotten very hot after the
> thing dies.  (Be careful to avoid high voltages!)  That chip would be a
> prime suspect.  You might time how long it takes for the thing to die after
> you turn it on, and see if holding an ice cube in a plastic bag against the
> suspect chip lengthens this time significantly.
>
> Good luck!
>
> Art
>
> On Mon, Apr 27, 2020 at 10:55 AM Walter Zambotti <zambotti at iinet.net.au>
> wrote:
>
>> I have an old 4x3 1280x1024 LCD monitor that is still working but is
>> loses picture when it has been on for a few hours. It's an ACER AL1916 A.
>>
>> I would like to repair the thing to use with my CoCo but I have no
>> hardware experience with these things.
>>
>> How hard is it to diagnose what the problem is?
>>
>> And what are my chances of fixing it?
>>
>> Walter
>>
>>
>>
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