Problems? See this thread at archive.org.
There is a strange whistling and buzzing sound in Dell Studio1749, and also both in 1749 and 1747 the fans are noisy.
Look below for links to records of those sounds.
Both notebooks were manufactured in mid of June 2010.
Specification:
1. Dell Studio 1749, i5-540M, ATI HD 5650, Screen FullHD (model AUO148D), HDD Toshiba MK5056GSY, BIOS A04 22/04/10.
2. Dell Studio 1747, i7-720QM, ATI HD 4650 (in the invoice it is HD 560v), Screen HD+ (model SEC544B), HDD Hitachi HTS725050A9A364, BIOS A08 03/04/10.
Both have 90W PSU and Windows 7 64 bit.
1749 in that configuration is more expensive than 1747.
The most annoying is the high pitch sound and the buzzing sound. They are more annoying than the noise from the fans, even though that high pitch and buzzing sound is pretty low and can be heard only in a quiet room.
First, there was only the high pitch whistling sound, the buzzing sound appeared a day later.
Record of high pitch sound without buzzing sound:
http://tinyurl.com/Dell-Studio-1749-11-mp3
Record of the high pitch sound with the buzzing sound:
http://tinyurl.com/Dell-Studio-1749-2222-mp3
You can also hear in those records that the fan despite CPU being idle is periodically switching on to high rotations (instead of rotating slowly and silently all the time, like it is in most of other notebooks).
To compare, below is a link to record of noise from Dell Studio 1747 (there is no high pitch whistling sound and no buzzing sound, although the fan seems to be a bit louder than in 1749):
http://tinyurl.com/Dell-Studio-1747-1mp3
Have you experienced such high pitch and buzzing noises in your notebooks?
What is their source and how to get rid of them?
I know that some people complain about the fan noise, but to be honest altgought I agree that it is distracting (the fan shouldn't behave like that), I have seen a 3 years old Fujitsu-Siemens Amilo pi 2515 notebook which had considerably more annoying fan.
More annoying than those fan noises are the whistling and buzzing noises in Dell Studio 1749.
The high pitch sound can be heard all the time regardless of CPU load, and regardless of connection to mains or battery.
The high pitch sound dissapears only when hard disk is very busy, like when searching surface for errors in HD Tune Pro (trial version).
Therefore I think that that sound can be from the hard drive, particularly that 1747 has a different hardrive and no such high pitch sound appears there. After removeing the back cover, I could confirm that the whistling sound is coming from the hard drive. The buzzing sound is coming from somewhere around CPU / GPU, but it is not a result of fan activity.
Can you please check out (particularly if you have the same disk model), whether you can heard this sound in your notebook?
It seems particularly loud near the touchpad.
Please, remember, that you have to have completely silent room to be able to hear it.
What's more HD Tune under SMART tab shows a warning:
http://tinyurl.com/warning1
http://tinyurl.com/warning2
In case of 1747 there is no such warning, but there is another disk installed than in 1749.
Other problems noticed:
1749
1. CPU throttling - CPU cannot get full frequency under full load (maximum it shows is 2793.5 MHz, while it should be 3.06 GHz).
2. video freezes itself in Firefox 3.6.4 when watching internet TV in
flash in full screen or full HD youtube videos in full screen. Esc key
helps to defreeze video. It does not happen in IE, but also it does not
happen in Firefox on other computers.
3. system restarted itself suddenly even without showing blue screen
(after the restart there was a standard window to choose whether to run
windows in normal mode or not); on another time it showed a blue screen before restarting;
4. too tight USB ports (they scratch the metal part of USB plugs quite
deeply). See the picture: http://tinyurl.com/usbscratches
5. fullHD screen looses perfect colors slightly even when set at 90
degrees (of course in 1747 with "ordinary" screen it is even worse)
6. From time to time the fan runs high speed all the time non-stop,
even when CPU is idle and air coming from the radiator at the back is
cool.
Only turning the notebook off and on or making the CPU to work at maximum load
and then making it idle again is causing the fan to stop running at
maximum rotation speed non-stop.
7. When one touches the frame of the screen on the right-hand side or put
a slight pressure on the back of the frame (back of the lid near the
frame) on the right-hand side, the picture on the screen becomes distorted
(apparently such touching causes LCD matrix to be touched / bended), as
you can see on the video, which I have shot:
http://tinyurl.com/1749video
Such distortion does not happen in other parts of the frame, only the
right-hand side.
1747
1. Blue screens, restarting itself (it happend only with operating system
installed and nothing else apart from HD Tune, which was not running
then), did not wake up once from sleep (black screen, but backlit LED were
on), crashed Performance Test 7.0 when running it for the first time.
2. overheating under touchpad
3. CPU throttling.
4. too tight USB ports (they scratch the metal part of USB plugs quite
deeply).
It seems that this particular 1747 is less stable than 1749.
I haven't tested video yet, so I do not know if it freezes flash video
like in 1749 under Firefox.
Some praise highly fullhd screen 1920x1080 in 1749.
It is better, but not that much as it would seem from those praises (and
you have to pay for it additionally quite a lot).
I was particularly dissapointed that the fullHD screen looses its perfect
colors slightly even when set to 90 degrees (to the surface of the
keyboard).
Specification of the screens as shown in Dell manual:
17.3" HD+ WLED backlight TrueLife
17.3" FHD B+RG LED backlight, TrueLife
Maximum resolution:
HD+ 1600x900
FHD 1920x1080
Operating angle:
0 degrees (closed) to 140 degrees
Luminance:
HD+: 220 nits (60% CG)
FHD: 300 nits (92% CG)
Viewing angles:
Horizontal
HD+: 40/40
FHD: 60/60 (both 72% and 90% CG)
Vertical
HD+: 15/30 (H/L)
FHD: 50/50 (both 72% and 90% CG)
Pixel pitch
HD+ 0.24 x 0.24 mm
FHD: 0.20 x 0.20 mm
Those notebooks would be fine, if not all those problems.
What would you do, would you keep one of them, if so, which one, or return
them both (if so, what other notebooks with similar specification and
price are available?)?
Is there any way to get rid of those whistling and buzzing sounds?
Would Dell service be able to fix them?
Have you experienced such problems with those sounds?
Performance Test 7.0 for both notebooks and a comparison benchmark for
1749 with other systems:
http://tinyurl.com/1747benchmark
http://tinyurl.com/1749benchmark
http://tinyurl.com/1749benchmarkcompare
Also, I heard from another person that he had the following experience
with the same model notebooks:
"1747: the notebook died during BIOS upgrade, bulgy keyboard, uneven
touchpad keys, camera stopped working, when copying files from a server
(cabel 1Gbit) it was hunging up/rebooting;
1749: when watching video (BD, DVD, DivX) on TV through HDMI there were
crackling noises and other sound distortions; after changing main board
the problem dissapeard, but only when the notebook was working on
batteries, so it did not really dissapeared. When connected to Panasonic
46G20 (crackling noises and other distortions), Samsung LE40B650 - 'as if
there was no HCDP compatibility' (errors when playing BD) and general
problems with configuration. Eventually the notebook died completelly.
Nothing worked, it was not possible to turn it on."
I have no means of testing HDMI or 1Gbit network, so I do not know if
those notebooks I have would have those issues described above.
Perhaps you could test it, though (please, let me know about the results).
-
I almost bought the 1747 in May. I talked to Dell sales and even without having ever read anything on notebookreview.com, I questioned them about the heat problem with so much packed into so small a space. Their response was that Dell engineers would never design anything with such a flaw. Well, that seemed dubious to me. I ended up getting the Asus G73jh A1 instead. It has been exactly what I hoped. No heat issues at all, no fan noise at all, just great performance, plus I saved a few bucks in the process! I really wanted the Studio for its great looks though. After going over the threads here in this forum, I see that I dodged a bullet!
-
Should also note that G73 has no express card slot either, so no way to add eSATA or, say, USB 3 port in future. It's for this reason I didn't get it. Such a stupid ommision by ASUS - I have a smaller, cheaper G50v that has both these.
So far my 'broken system' 1747 is working quite nicely (fingers crossed it continues to...)
Strange whistling and buzzing noise in Dell Studio 1749 and fan noises in 1749 and 1747.
Discussion in 'Dell' started by dragonf, Jun 26, 2010.
