A5000 help

[Kdc]

Hi all recently got a A5000 had been lying for years
and removed slightly leaking battery and cleaned area

Holding 5 then booting up I’m using a Philips crt monitor
Getting scrolling red screen any ideas? I’ll add a pic
Cheers

[growntree]

I thought it was usually hold down R while turning on to reset the configuration settings, but you might just need to change the resolution settings (think it is middle button on the palette icon?) Might also be worth checking the connection on the video lead to see if anything has corroded over the years.

[thecellartroll]

If you've snipped the battery you need to hold down "Delete" every time you power on.

[a1exh]

You're attached to a 15KHz monitor. Isn't the default for A5000 to output a 31KHz screen? I don't know I've never had mine working yet but that was one of the attractions for me that the A5000 could output 31KHz screens.

[Kdc]

Thanks when I press delete I don’t get a picture
Tried R as well no joy
Only when i hold 5 or 6 says briefly initializing then scrolling screen

[Kdc]

The Philips is the only tv I have what lead do I need
If I get a cheap lcd tv?

[a1exh]

15-pin D male->male VGA cable + 15-pin D ->9-pin D adapter

https://www.retro-kit.co.uk/page.cfm/co ... index.html

Something like this :

https://www.amazon.co.uk/Aptii-HD15-Fem ... B005M1M4J2
https://www.amazon.co.uk/gp/aw/d/B098NRJBN7

Or possibly this :

https://www.amazon.co.uk/Conversion-KAN ... B08GXYJWZB

Obviously you need an LCDTV / Monitor with a VGA input. Most older ones have that. If you have a LCD monitor or your living room TV have a look if it has VGA input.

[Kdc]

Cheers I’ll try that

[a1exh]

Get some feedback from A5000 users. Perhaps there is something they can get you to type to switch to 15KHz mode.

[DutchAcorn]

The A5000 works fine with a VGA monitor, using a standard VGA 15 pin cable.

Are you sure the video cable you are using now is ok?

It should default to 15KHz mode if you keep 0 pressed on the numeric key pad while resetting.

[thecellartroll]

Get some feedback from A5000 users. Perhaps there is something they can get you to type to switch to 15KHz mode.

Press F12
Type wimpmode 15
Press Enter

[Kdc]

Yes already got a 15 pin to 9 pin lead
I’ll try typing but not easy with the scrolling!

[flaxcottage]

If you have a TV with PC input try that. Switch on with Del key pressed and it should work if all is well.

The VGA lead is also important from experience. Modern ones just do not work despite what advice is given.

[Kdc]

May be the cable I bought from Amazon
but not sure where to look already spent £25 on 2 cables
I’ll try 0 again although I’ve tried holding numbers 0-9 already
Screenshot pic is button 5

[steve3000]

You're attached to a 15KHz monitor. Isn't the default for A5000 to output a 31KHz screen? I don't know I've never had mine working yet but that was one of the attractions for me that the A5000 could output 31KHz screens.

Nope, the default for A5000, like every RISC OS 3.1 machine, is 15kHz.

The screen above is clearly running at 15kHz and the A5000 is outputting 15kHz, or you wouldn't have horizontal sync (and wouldn't see a recognisable display). The issue here appears to be an incorrect vertical or composite sync setting or an incorrectly wired lead.

I'd suggest first trying *configure sync 1 and returning to desktop, to see if that helps. Otherwise it could be the cable wiring that's wrong, try reading this: https://www.retro-kit.co.uk/user/custom ... te-249.pdf

The A5000 will work nicely with 15kHz, multi sync or fixed 31kHz VGA and 35kHz SVGA screens, but it always starts at 15kHz, completes the power-on self test (filling the 15kHz screen with blue and magenta colours) then checks the 'ID' pins on the cable, to 'detect' VGA or SVGA, and switches mode to the detected type (or stays at 15kHz if nothing detected) during boot-up.

[Kdc]

You're attached to a 15KHz monitor. Isn't the default for A5000 to output a 31KHz screen? I don't know I've never had mine working yet but that was one of the attractions for me that the A5000 could output 31KHz screens.

Nope, the default for A5000, like every RISC OS 3.1 machine, is 15kHz.

The screen above is clearly running at 15kHz and the A5000 is outputting 15kHz, or you wouldn't have horizontal sync (and wouldn't see a recognisable display). The issue here appears to be an incorrect vertical or composite sync setting or an incorrectly
wired lead.

I'd suggest first trying *configure sync 1 and returning to desktop, to see if that helps. Otherwise it could be the cable wiring that's wrong, try reading this: https://www.retro-kit.co.uk/user/custom ... te-249.pdf

The A5000 will work nicely with 15kHz, multi sync or fixed 31kHz VGA and 35kHz SVGA screens, but it always starts at 15kHz, completes the power-on self test (filling the 15kHz screen with blue and magenta colours) then checks the 'ID' pins on the cable, to 'detect' VGA or SVGA, and switches mode to the detected type (or stays at 15kHz if nothing detected) during boot-up.

Hi thanks can i type that in after it boots up not easy to see with the screen scrolling obviously but if i just start to type should be fine

[steve3000]

Yes, press f12 and start typing

[Kdc]

Cheers will try tomorrow

Just to add very friendly forum here cheers