problem after problem

[jimbob005]

hi all
ok i will start from the top ok iv gat an a1200 happy playing lemmings about 6 weeks ago and the colors went funny so i got an rgb to vga adapter and then found out i carnt play lemmings becouse vga monitors dont go down to 14.4 mhz so i got another main board and that one didn`t boot (ebay) so i found a commodore 1084s monitor (YES) all i need now is a rgb to 9 pin lead and that came today yippy pluged it in and now the screens rolling any one help me ??
thanks
james

[Ilwrath]

pluged it in and now the screens rolling any one help me ??

The 1084 monitor should have a VHOLD knob...  (I think the location varies by sub-model, most are either on the front lower panel [under the decorative door that's probably broken] or in the lower back [beneath the "hump" that sticks out from the back of the tube.)  Adjusting that VHOLD should help.  :-)

[jimbob005]

ok iv had a look around it and i carnt see and VHOLD knob any where

[amiga_3k]

James,

What type of monitor did you use when the colors went funny? The best thing to do first with old electronics behaving badly is getting a can of contact-spray. This spray cleans electronic contacts. Apply it to the connector-pins of the cable and re-fit the cable, see if things change. If not, continue below.

It could be that the cable you used to connect the Amiga to the monitor has been internally damaged (most chance of it being damaged at either one of the connectors). This can be checked by plugging the cable into the monitor and the Amiga (turn both on) and gently 'wiggle' the cable a bit, while holding the connector steady, just behind the connector of the monitor. If no influence of that action can be seen on the monitor do the same just behind the connector sticking into the Amiga. If again no influence you'd be checking the connection between the connector of the cable and the ports in the monitor / Amiga.

These ports can be checked by very gently wiggle the connectors a bit. Again check for any influence. If there's any influence at the monitor or the Amiga the ports need re-soldering.

On the rolling issue... The oldest model 1084S monitors have a set of three or four turning knobs  at the back-side of the monitor, near the 9-pin connectors. Play a bit with those and see if it helps.

[alexh]

vga monitors dont go down to 14.4 mhz

15.75 KHz even ;-)

so i got another main board and that one didn`t boot

Send it BACK!!

ok I've had a look around it and I can't see and VHOLD knob any where

AFAIK there is no vertical hold knob on 1084 monitors. On the back of the monitor there should be V.Size, V.Shift, V.Width knobs and in the front panel there is H.Shift. There was no need for V.Hold or H.Hold as they had a cool timing circuit which could handle all valid modes.

[nasty]

AFAIK there is no vertical hold knob on 1084 monitors. On the back of the monitor there should be V.Size, V.Shift, V.Width knobs and in the front panel there is H.Shift. There was no need for V.Hold or H.Hold as they had a cool timing circuit which could handle all valid modes.

yip your right there!


1084s Back image

1084s front image