Weak signal with my intel based imac

well,
i am unable to connect to my wireless linksys router in the other room. i have a Dell laptop that connects with 100% signal strength, but my imac will connect with 1 bar if it connects at all. most of the time it just says error connecting to:
i was able to connect to it when my imac was on the same desk as the router.
could my wireless card be bad?
thanks for any help.

Hi lucifuge777!
Update the router's firmware. Get that from the router maker's website, in their support section. The AirPort card's connection could be loose, but you can't fix that on your own.
Try setting up a new configuration for an AirPort connection in your Network panel of System Preferences. Click the "Assist me..." button at the bottom, then the blue "Assistant..." button on the drop-down. Network Setup Assistant will open and walk you through it. Be sure to activate the radio button for "I use AirPort to connect to the Internet wirelessly." Your prior configurations will not be changed and will be saved. You can rename the new configuration later, if it works out.

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Hi guys,
since yesterday my Intel-Based iMac doesn't boot normally, its stuck in grey screen with a spinning wheel.
Its an Intel-based iMac 21.5'' purchased in 2011, and i recently (2 months ago) upgraded it to Mavericks.
-2 weeks ago, i installed smcFanControl app
-Tried start up in Safe Mode by holding Shift but its not working. i think i hear fans are working more than they were before the problem occurs.
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SMC ::smcReadKeyAction ERROR THOP kSMCBadArgumentError(0x89) fKeyHashTable=0x0xffffff8029fa1000
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tried to remove FanControl as explained here: http://apple.stackexchange.com/questions/110667/errorr-kernel-smcsmcreadkeyactio n-in-console
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Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
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b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, boot from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
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Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
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Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
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They were often preceeded by video glitches, so I assumed it was a bad video card- unfortunately soldered to mother board.
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"Following up on my previous posting regarding my son's late model 2006 iMac that required a $900 logic board replacement:
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The control panel also gives the temps sensors are reporting at the CPU, hard drive and DVD drive. The CPU sensor reports the CPU temp as 32 degrees F- which is clearly wrong, unless Apple has been installing little refrigerators inside.
So thanks to Bodomann for posting- Hats off and three cheers to Derman and Cristoph for source code.
http://www.derman.com/iMac-Fan-Control
http://www.lobotomo.com/products/FanControl/index.html

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I also have a pair of wonderful sounding old Mission speakers that are not self-powered,
and I was wondering if anyone knew whether the iMac's internal amp can drive them.
*No way!* The iMac's 24 watt internal amp is NOT connected to the headphone output;
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[Apple Audio Developer Note|http://developer.apple.com/documentation/Hardware/Conceptual/HWTechAudio/Articles/Audio_implementation.html#//apple_ref/doc/uid/TP40003978-SW281200331167]
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