Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I recently attached another monitor to my NetBook; it worked fine for a few hours.

I turned it off a while ago. I then tried to turn it back on, and all it does is a weird noise, sort of like a hard-drive seek, but higher pitched and faster (sorry I don't really know how to describe it).

The image appears, the backlight flickers a little, but then the monitor goes completely black (backlight shuts off) within about 2 seconds. If I attempt to turn it off and on again, it does the exact same thing.

I don't think it's a power issue, because the green light indicating that the monitor is on is still lit, even after the screens turns black (I also tried switching outlets and AC cables, but it didn't help).

The monitor is a Sony LCD SDM-S75A.

share|improve this question
If possible, attach the monitor to another device and see how it behaves – Phil D. Feb 10 '11 at 8:53
@Phil D. : I have now tried that, it does the exact same thing. – houbysoft Feb 11 '11 at 0:07
up vote 0 down vote accepted

Sounds like a hardware failure. Is the monitor still under warranty? If not, it's unlikely to be worth the cost of a repair.

share|improve this answer

This issue could theoretically be caused by an incompatible refresh rate coming out of the netbook, and the monitor doesnt know how to handle it, and is spazzing out.

share|improve this answer
+1 for the highly technical term "spazzing out". But seriously, it sounds like a refresh problem to me too, which is what the upvote was really for :-) – user3463 Feb 10 '11 at 5:30
If it was the refresh rate the monitor would have an "out of range" message on the screen. – Chris Feb 10 '11 at 13:34
I have now tried to change the refresh rate (strangely enough every time I change it the monitor starts working for the 2 seconds again), and it doesn't seem to be the problem as indeed it shows "out of range" for higher refresh rates. Moreover, I tried to turn it on without any input, and it shows "Cable disconnected, go to power save" as it should, and then dies after 2 seconds.(when it worked, it usually displayed the message for at least ~20 seconds). Looks like it really is a hardware problem :( – houbysoft Feb 11 '11 at 0:06
I would try connecting to something else. The output may be bad. What is the model of the netbook? – DaBaer Feb 11 '11 at 0:44
Sorry for a really late reply, I kind of gave up. I tried connecting it to something else, as I said in the comments to the question, it does the same thing. The netbook output works fine on my TV. – houbysoft Apr 5 '11 at 2:37

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.