A600 power LED dead!

Supamax · 25 April 2009, 16:07

Hi,

I made a very stupid thing today with my A600

.
I wanted to try a Logitech serial mouse with it (I thought it could be compatible, and didn't investigate on the Web before trying), so I:
- unplugged the Amiga mouse (with the A600 ON)
- plugged it again, and it worked (so I thought "hey, mouse hot-swapping works!")
- unplugged it
- plugged the Logitech mouse in, and as soon as I did it... *poof*, the Power LED died instantly.

I fear I damaged the mainboard... what can I dooooooo?

Edit: the other LEDs work, and the keyboard also works.

rkauer · 25 April 2009, 16:34

Probably you burn the resistor who acts like a fuse in the mouse port. If not, you burn Paula, so no more floppy, too.

A600's Paula is SMD (like 1200/4000/4000T), check with people who is able to do a rework on the board.

Toni Wilen · 25 April 2009, 16:47

Power LED is controlled by CIA-A (and firebutton/left mousebutton goes to CIA-A) but I don't see how it can get damaged without feeding it something like +12 which isn't available in joystick port.

CIA/Paula/Denise pins connected to mouse port are normal IO-pins, direct connection to either ground or +5v won't cause any damage.

(do you mean the Amiga works except power led? Who cares about the led?

)

Supamax · 25 April 2009, 16:52

Quote:

Originally Posted by rkauer

Probably you burn the resistor who acts like a fuse in the mouse port.

Where is it located exactly?

Quote:

If not, you burn Paula, so no more floppy, too.

No, the floppy works, it's the first thing I checked!!

Paul_s · 25 April 2009, 16:52

Quote:

Originally Posted by Supamax

Hi,

I made a very stupid thing today with my A600

.
I wanted to try a Logitech serial mouse with it (I thought it could be compatible, and didn't investigate on the Web before trying), so I:
- unplugged the Amiga mouse (with the A600 ON)
- plugged it again, and it worked (so I thought "hey, mouse hot-swapping works!")
- unplugged it
- plugged the Logitech mouse in, and as soon as I did it... *poof*, the Power LED died instantly.

I fear I damaged the mainboard... what can I dooooooo?

Edit: the other LEDs work, and the keyboard also works.

to the tower with you young sir. Unplugging mice/joysticks whilst Amiga is on is a criminal offence. In Italy you are fed to the sharks with tomato in mouth

Supamax · 25 April 2009, 16:53

Quote:

Originally Posted by Toni Wilen

(do you mean the Amiga works except power led? Who cares about the led?

)

Exactly, only the Power LED

.
But I would like to have it fixed, sniff !!

Paul_s · 25 April 2009, 16:55

Quote:

Originally Posted by Supamax

Exactly, only the Power LED

.
But I would like to have it fixed, sniff !!

eBay is your friend, or Amigakit may be able to source you a new LED PCB et al.

Supamax · 25 April 2009, 16:55

Quote:

Originally Posted by Paul_s

to the tower with you young sir. Unplugging mice/joysticks whilst Amiga is on is a criminal offence. In Italy you are fed to the sharks with tomato in mouth

You are joking

. I don't think that plugging/unplugging a normal Amiga mouse/joystick can cause damages... am I right?

Supamax · 25 April 2009, 16:56

Maybe it's only the LED (burnt)?
It seems impossible to me... Isn't a LED much more robust than other components?

Supamax · 25 April 2009, 17:02

WAIT WAIT WAIT !!!!

It turned out to be a stupid problem: one of the keyboard's 4 cables (the red one) was nearly detached/cut. I touched it now and it came away...!

I'll solder it back and all will be probably well.

Sorry if I bothered you all with this. Sometimes the solution is under our eyes, and much more simple than we think

EDIT: the strange thing is that the only side-effect of the detached red cable is the Power LED death...

Paul_s · 25 April 2009, 17:03

Quote:

Originally Posted by Supamax

Maybe it's only the LED (burnt)?
It seems impossible to me... Isn't a LED much more robust than other components?

It may just a be a co-incidence it going. Hard to say really with the components in the A600 being over 15 years old now. I've never known anyone to damage an Amiga whilst unplugging mice etc with it being on but there's always a chance it could cause something to go pop. C= always put a warning label on to that effect.

Supamax · 25 April 2009, 17:06

The A600 keyboard connector has four cable: green, orange, red and black.

Which is the function (which data does it convey) of the red cable?

rkauer · 25 April 2009, 20:57

No "data", red cable on the little led board is only to feed the power led with positive voltage, green is for HD, orange to floppy, black is ground.

Supamax · 25 April 2009, 22:28

Quote:

Originally Posted by rkauer

No "data", red cable on the little led board is only to feed the power led with positive voltage, green is for HD, orange to floppy, black is ground.

Ok, then all is clear

. The "poor" power LED cannot receive any current

gklinger · 26 April 2009, 20:55

I'm glad this worked out and I hope you learned your lesson. You got lucky. You should avoid pushing your luck again lest things not work out so well.

Supamax · 05 May 2009, 20:42

Quote:

Originally Posted by gklinger

I'm glad this worked out and I hope you learned your lesson. You got lucky. You should avoid pushing your luck again lest things not work out so well.

I know

, usually I'm very careful but I got that "urge" to try without delay/research...

25 April 2009, 16:07	#1
Supamax Da Digger :) Join Date: Nov 2008 Location: Monza, Italy Posts: 2,822	A600 power LED dead! Hi, I made a very stupid thing today with my A600 . I wanted to try a Logitech serial mouse with it (I thought it could be compatible, and didn't investigate on the Web before trying), so I: - unplugged the Amiga mouse (with the A600 ON) - plugged it again, and it worked (so I thought "hey, mouse hot-swapping works!") - unplugged it - plugged the Logitech mouse in, and as soon as I did it... poof, the Power LED died instantly. I fear I damaged the mainboard... what can I dooooooo? Edit: the other LEDs work, and the keyboard also works.

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25 April 2009, 16:34	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Probably you burn the resistor who acts like a fuse in the mouse port. If not, you burn Paula, so no more floppy, too. A600's Paula is SMD (like 1200/4000/4000T), check with people who is able to do a rework on the board.

25 April 2009, 16:47	#3
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,545	Power LED is controlled by CIA-A (and firebutton/left mousebutton goes to CIA-A) but I don't see how it can get damaged without feeding it something like +12 which isn't available in joystick port. CIA/Paula/Denise pins connected to mouse port are normal IO-pins, direct connection to either ground or +5v won't cause any damage. (do you mean the Amiga works except power led? Who cares about the led? )

25 April 2009, 16:56	#9
Supamax Da Digger :) Join Date: Nov 2008 Location: Monza, Italy Posts: 2,822	Maybe it's only the LED (burnt)? It seems impossible to me... Isn't a LED much more robust than other components?

25 April 2009, 17:02	#10
Supamax Da Digger :) Join Date: Nov 2008 Location: Monza, Italy Posts: 2,822	WAIT WAIT WAIT !!!! It turned out to be a stupid problem: one of the keyboard's 4 cables (the red one) was nearly detached/cut. I touched it now and it came away...! I'll solder it back and all will be probably well. Sorry if I bothered you all with this. Sometimes the solution is under our eyes, and much more simple than we think EDIT: the strange thing is that the only side-effect of the detached red cable is the Power LED death...

25 April 2009, 17:06	#12
Supamax Da Digger :) Join Date: Nov 2008 Location: Monza, Italy Posts: 2,822	The A600 keyboard connector has four cable: green, orange, red and black. Which is the function (which data does it convey) of the red cable?

25 April 2009, 20:57	#13
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	No "data", red cable on the little led board is only to feed the power led with positive voltage, green is for HD, orange to floppy, black is ground.

26 April 2009, 20:55	#15
gklinger Vegetable Lasagna Join Date: Mar 2007 Location: Toronto, CANADA Age: 54 Posts: 711	I'm glad this worked out and I hope you learned your lesson. You got lucky. You should avoid pushing your luck again lest things not work out so well.

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