high picth on my acer tm 8104

Hello everyone i think i manage to get rid of my whinning noise high pitch noise on my computer this is what i think i may have done to get rid of some of the noise I just turn my bluetooth on in the computer and suddenly most of the noise went away i am just wondering how could this might have had to do[ ] something with it
Anyways if some one wants to ask me any question about the acer tm 8100 please dont hesitate in contact me
Gracias

 

sorry ment the computer fan OR the cpu

 

There are a few possibilities. Some owner have reported getting a high pitched noise from the AC adapter, if that is the case you can call Acer and have them send you another one. Others have reported that they get a noise when the battery is charging. To fix this , you'll have to send in the laptop and ask them to replace the charging circuit board.

 

<blockquote id='quote'> quote:<hr height='1' noshade id='quote'>Originally posted by chusky

 

This is a similar issue I have come across on the HP Centrino product lines as well has read multiple posts regarding this exact same problem from users with different brand Pentium M (Centrino) notebooks. It looks like a design flaw with just PM notebooks. With my dealinngs with HP's engineering dept, it turned out to be a cap/resistor (can't remember, over a year ago) that was causing the noise. Their work-around was to put some glue/epoxy over the offending part to stop the noise. To this day, some of their new Pentium M notebooks still produce that exact same noise.

There is a possible work-around that you can try to see if it helps.

1. Have a USB mouse/keyboard or USB drive connect to your USB port. This will eliminate the noise completely since it's drawing power from the ports.

2. Goto Device Manager & under the USB Hubs, goto the properties and under the power management tab, try enabling or disabling the "Allow the computer to turn off this port to save power" (or something similar) for all the USB Hubs.

3. Change your Power Management setting from Always On to Laptop/Notebook. This option helped on my old NX7000, but not on my current unit.

Option 2 was working great (turned them all off) until my system when into StandBy mode. When I brought it back, I couldn't get rid of the noise unless I had my USB Drive connected to the USB port. [ !] The problem also seems to come back when I'm running on batteries, but goes away when I'm on AC.

Give these options a try and let me know what works for you.

-Vb-

 

<blockquote id='quote'> quote:<hr height='1' noshade id='quote'>Originally posted by Venombite

 

I had the same issue on my 8103WLMi, a high pitched noise that emanated from the area close to the AC adapter plug. Obviously power related.

I was able to eliminate the noise completely by activating the Bluetooth, just as chusky described in his first post.

Now I just leave it on when I am using my laptop, it may draw a little extra power, but the alternative is to keep hearing the noise (very annoying), or send it in for replacement (will this even fix it?). Anyway, the downtime is impossible for me atm, so I am sticking with the 'Bluetooth always on' fix for now.

I have until end of July to send it in (90 day warranty, it's a refurbished model). Haven't decided if it's worth the hassle, if anyone can offer an estimate of difference in power consumption between Bluetooth on and Bluetooth off, that would may allay my concerns about always leaving Bluetooth on.

 

on the bluetooth question:

looking at this old article
http://rfdesign.com/mag/radio_bluetooth_power_consumption/

bluetooth on master node (as it would be in your laptop) consumption worst case scenario is about 30 mA average (I'm assuming 5 V at the time the article is written). You almost assuredly have a lower power part in your machine, but again this is worst case. That yields power consumption of about .15 W.

Now, the TM8104 is fairly full featured. Just a guess, it's probably got an avg consumption in the neighborhood of 20 W. In that case, the idle Bluetooth would be less than 1% of consumption.

My call: your bigger issue is locking down the Bluetooth so its not a security risk.

Disclaimer: I am not an RF or electrical engineer, so take for what its worth.

 

<blockquote id='quote'> quote:<hr height='1' noshade id='quote'>Originally posted by Xideus

 

venombite,

did you maybe leave the bluetooth discoverable? this would make the device assume its looking for a connection and transmit at max power. or maybe were you using BT for connection to phone or mouse? if BT is taking up about 20% of batt life at idle, something is seriously wrong. i had an hp ZT3000 (with the same issue, btw), and my experience was nowhere near that.

food for thought,

--dan

 

Cuoog,

I didn't configure anything with the Bluetooth, so it should be at max power. I was just happy that the noise was gone and only 30-45mins shorter in battery life was fine by me. I sent my unit back for an exchange and should get a new one next week, so I'll report back after I make some changes to the settings. Thanks for the heads up.

-Vb-

 

I bought an 8104 a couple of month ago. After I tried to use headphones with a microphone a couple of days ago, the sound has gone crazy. I now have a very loud, high pitched noice coming out of the bottom of the laptop. Enbling bluetooth doesn't make a difference. Can anyone suggest how to get rid if this?