Info on repairing old commodore and philips monitors

[iamaboringperson]

I have old 1084(s) monitors that make funny high pitched sounds and don't light up the LED.
Plus those old philips ones(the ones that people often used with their amigas), which make strange high pitched sounds.

I'm wondering what common problems these monitors have?
Any particualar components I should be looking at? (I did check the fuses years ago)
Are there resources on the web about fixing these monitors?

Or should I just give up and dump them?

 :-)

[Damion]

Hmmm....I have an old 1802 that started doing the
same thing weeks after I bought it. First it
would randomly shut off, then eventually nothing.
No LED, but you could hear something in there
singing.

I had the local C= dealer fix it (he said it was
a bad PSU), and exactly one day after the
warranty had expired (30 days), it broke again!
Our scum dealer wanted to charge to fix it the
second time...I told him to eat ****, and the
monitor still sits in my closet...almost new,
yet broken.
 

[iamaboringperson]

I had the local C= dealer fix it (he said it was
a bad PSU), and exactly one day after the
warranty had expired (30 days), it broke again!
Our scum dealer wanted to charge to fix it the
second time...I told him to eat ****, and the
monitor still sits in my closet...almost new,
yet broken.

There is one 1084S that I was going to throw out.

[Damion]

There is one 1084S that I was going to throw out.

Yeah, I almost tossed mine too.

It's interesting to hear that somebody had
the same problem with their C= monitor. Maybe
it was a common thing with them? :-?

Anybody here used to fix these things, and can
tell us the likely culprit? No LED, but part of
the board must be getting power, becasue there
is something inside "zinging" up..

[DoomMaster]

Just install a Commodore A2320 card into your Amiga 2000s video slot and hook up a new ViewSonic 17" Flat-Panel display.  That's what I have.  It really looks awesome!  Throw away those old monitors.     :-D

[iamaboringperson]

DoomMaster wrote:
Just install a Commodore A2320 card into your Amiga 2000s video slot and hook up a new ViewSonic 17" Flat-Panel display.  That's what I have.  It really looks awesome!  Throw away those old monitors.     :-D

hmmm Does it have to be 'ViewSonic"? What about other brands? must it be 17"? Why may I not chose CRT?

But thanks for the monitor repair advice anyway, "doommaster"

[Dr_Righteous]

@iamaboringperson

Some stuff I found on A-H that might help:

The door covering the front-panel controls is typically broken off.    

The attached cables or connectors on some models tended to fail, causing loss of color or other problems. Resolder the pins. You can glue connectors in place to provide support.

Failed or insufficient insulation may cause arcing.

The power switch may partially fail, causing separate parts of the monitor to power down.

A phone caller suggested that internal connectors could tarnish with age, and disconnecting and cleaning them may help clear up some problems.

Repeatedly blown fuses can indicate a bad power supply.

A loud whistling noise indicates a bad flyback transformer (also known as an LOPT). Some 1084 monitors also have digital RGB (PC clone CGA) inputs, and there was such a profusion of minor or major variations that any 1084 might have any combination of analog RGB, digital RGB, and composite inputs.

[iamaboringperson]

Thanks Dr_Righteous, that just might help!

:-)

[Jope]

Like people said above, it's usually the flyback's solder connections. Solder it down again and see if it starts working.. (resolder all of the joints just in case)

If it's the PSU module, then that might be a bit trickier to fix.. I ended up in just swapping the PSU for one from another broken 1084 when I was last repairing those.

I tend to swap "PC/AT" power buttons in place of the flimsy ones that were there from the factory. You need to do some modifications to the case, though.. If you replace the switch with an identical one, it'll fail some time again. :-(

At that time at least Philips made some low quality stuff.. The C=1084 / Philips 8833 is otherwise a nice monitor, but they're really ridden with problems. Some work fine for ever and others fail mysteriously.

[Skyraker]

If you do take the back off the thing, make sure you remove the thich red cable that attaches to the back of the CRT.. then earth it to discharge anything left in there.... if you dont and it manages to earth through you..... it's kinda painful..

Regards

sKy

[Controller]

I had one where the on-switch on the front of the monitor broke. I just hotwired it - the only bad part was that the only way to turn it off was to pull plug. My brother tried to put a new switch in it, but maneged to break it with static-electricity. He made a ligthning that was over a meter long. Looked real cool
 :roflmao:  

By the way I have another one of these moniters, that I don't use any more. So if anybody wants it, its yours for free. :-D

[Cass]

I have old 1084(s) monitors that make funny high pitched sounds and don't light up the LED.

Me too have had the same problem on my old 1084s monitor, and I had to send it to a local TV repairman (when it first appeared the problem, there wasn't any commodore service left).

The fault should be on the high voltage circuity, but it won't cost you more than 40-30$

The annoying thing now is that if I try to move the screen horizontally on the extreme left, the display vanishes with a high frequency buzz (somethin I try to avoid doing).
________
Subaru Stella

[Karlos]

My old 1084 monitor is now sat in a cupboard. It's not dead but it faded to the point where you can only see something on full contrast / brightness whulst in a darkened room....
Not exactly ideal :-)

[Tomas]

I have an old pc monitor that had the exact same prob, turned out to be a cable that had bad connection, so you might want to check that the cables/soldier is intact.

[Framiga]

Hi iamaboringperson

any TV repairs center, should be able to fix your problem.

It is a common and well known main board.

I, as all of you, have the schematics of the 1081/1084 (in bundle with its user-manual).

Ciao