A1200 doesn´t show any pic...

[Joe Maroni]

i´ve got an A1200 from ebay connect it to TV. First i used the HF output on a CRT TV. nothing...just black screen.
then i tried to use composite on same TV. nothing again, just black screen.

uhmm...

tried both connections on LCD TV and again...nothing...just black screen....


the miggy starts correctly...HD boot up...floppy starts clicking...everything is fine but no output...

can anyone help me what i can do now ???

the seller told that it worked fine before he sent it to me....

[roy bates]

was the seller using it through the rgb port then?

[Joe Maroni]

no..perhaps i should solder me an rgb<->scart cable

[roy bates]

yes you could try that.

also is your amiga pal or ntsc?

[Joe Maroni]

Pal

[roy bates]

if it still doesent work im thinking it may be a duff cxa1145 the part is located behind the rf port,although if you dont have a spare or soldering skills it may be better to send it back.

but it may not be this part someone else may have a better idea maybe.




EDIT:you may as well uscrew it and have a look for capacitor damage around that area as well just in case.

[Joe Maroni]

just got money back from seller..
but he told me that he won´t have the amiga back....ok...now i try everything you tell me..

[roy bates]

good man,dont bin it even if you cant find the fault someone will have it off you

or even fix it for you local






EDIT:if you want to see if it this part get a phono plug and wire it like this:

connect the outside of the plug to a ground point on the motherboard then connect the inner signal wire to pin 20 on the cxa1145m.(this gets you compisite video)

for reference pin 1 should be under the notch on the ic and then count round anticlock wise till your there. or forth pin from the left on the top row.

if ive made a mistake and anyone see's ,feel free to correct me.

[Joe Maroni]

motherboard looks very well....

[johnim]

try reseating roms too

[Joe Maroni]

as i said...the amiga works very well...
booting a Workbench disk as aspected but no video output on TV....
i´ve bought a RGB<->SCART cable from Amikit now...

press thumbs that the RGB port still works...

[Joe Maroni]

seems like the cxa1145m is damaged...i used to get signals from the chip, but nothing happens...

btw: it was the fifth pin from top left that gives composite signal

[roy bates]

ah yes i dident count the ground,sorry about that.


if its gone completly you probably wont get anything out of the rgb port either.

if it helps any you can still get these parts new.