Sony SDM-HS73 dead

[stevo1210]

I bought this Sony monitor brand new about 7 years ago, I'd have to say it's the best monitor I've ever used!
Then today it just wouldn't power on... it's as dead as cactus. I haven't done anything to it either. I just moved it from one side of the desk to the other (cables disconnected of course) and now when I plug it in, it won't power on AT ALL.
No power, no light... just dead.
Where should I start looking here?

Thanks.

[stevo1210]

Re: Sony SDM-HS73 dead

okay, just cracked the thing open and took a look. I took the secondary side cable off the power board and measured all the voltages... it was getting all 12V and 5V power... no problems there... then I disconnected the AC power cable and plugged the 12V and 5V lines back in and for a split second it came on!
Then I plugged the 240V AC cable back into the wall and it came to life again! Looks like oxidation or the like on the 12V and 5V cables. So it's fixed again
Minus two broken mini plastic clips on the way out

[FIXITNOW]

Re: Sony SDM-HS73 dead

if it starts playing up again replace Cap C207
use a good low esr version

[tiritrobo]

Re: Sony SDM-HS73 dead

if it starts playing up again replace Cap C207
use a good low esr version

I have a similar problem. Mine has all the badcaps replaced but still no image. Just at the first start, without PC connected, i have the litle image with message: PC CABLE NOT CONNECTED. If i plug VGA cable into the monitor with PC on, led start to blink in green continously. The main buttons does.nt work but only the power (led button).


Any other hints?

[Davi.p]

Re: Sony SDM-HS73 dead

"Mine has all the badcaps replaced"
How do you found that those are bad?

[tiritrobo]

Re: Sony SDM-HS73 dead

"Mine has all the badcaps replaced"
How do you found that those are bad?

With ESR, of course.

[tiritrobo]

Re: Sony SDM-HS73 dead

So, no more lyrics?

[budm]

Re: Sony SDM-HS73 dead

It sounds like it is not detecting the VGA signal so you probably having problem on the logic/scaler board. Not detecting signal can be due shorted protection diodes on the VGA signal line. Get the pin out of the VGA signal pins, then check tose pin against ground to see if the signals has shorted out. Also need to check voltages on the logic board at the regulator IC, etc.
Service manual, not sure how complete it is.


Is this the same chassis as yours?
http://s807.photobucket.com/user/bud...?sort=3&page=1

[Davi.p]

Re: Sony SDM-HS73 dead

If the mon. wasn't detecting vga signal it showed "no signal".. or at least do not switch off with a blinking led.. or you not explained well, what does if you switch on with the pc connected?

[tiritrobo]

Re: Sony SDM-HS73 dead

Like i said before, only when i connect the VGA cable to the computer i have blinking led. In rest, without connection on the VGA port i have (like i said) PC CABLE NOT CONNECTED.

[viziks]

Re: Sony SDM-HS73 dead

Like i said before, only when i connect the VGA cable to the computer i have blinking led. In rest, without connection on the VGA port i have (like i said) PC CABLE NOT CONNECTED.

Have you tried changing the PC resolution to a lower one 1024 >< 768? But without another working monitor it may be difficult. You can also try booting the PC into safe mode. Best way to conclusively test is connect monitor to another known working CPU or VGA port of laptop or TV tuner etc.

Samir