annoying sound when battery not fully charged
I have my laptop in the trunk and I recently put in a battery.
The battery is basically there so i can turn the car off n the laptop can go into hibernate w/o using the car's battery.
But now whenever the battery is not fully charged, I get an annoying buzzing sound. The sound stays there until the power meter is at 100%. So usually, it takes like 10-15 mins of driving for the sound to completely stop.
The screen also gets lines, and the lines are synchronized with the buzzing(stops when sound stops, comes when sound comes).
I already have a ground loop installed, and that didnt help get rid of the sound.
Anyone have any idea how this could possibly b fixed? Or what exactly is causing the interference?
Check for a ground loop issue
I have to respectively disagree. When the battery is fully charged and the computer is on, the "BRICK" as you call it, is still running to keep a 100% charge in the battery.
Originally Posted by anik321
It sounds like you have a ground loop problem. Especially, if the buzz or hum increases in frequency or volume (as you perceive it) when you rev your cars engine. Try to ensure that all of the electrical equipment for your carputer and stereo are connected to the same ground. An ensure that the ground is to bare metal and fastened tightly. I recommend reading about this issue in more detail in other posts...
A ground loop isolator or anything that you place inline between your computer and the amplifier to get rid of the high pitched hum, will also get rid of all your high pitched vocals, snares, guitar, etc. So don't do it.
This is the single best way to get a clean, noise free signal through your car stereo. I spent as much or more time grounding everything well, than wiring the power in the first place.