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03-31-2009 02:50 PM
Please help me,
I have a 6720s laptop bought almost one year ago. For a couple of months i have this big problem: the base of the display (for a small portion in the middle) heats a lot, the fan stays always at full speed and the battery doesn’t last more than a minute.
Can you give some advice?Operating System(s)Windows System : Microsoft Windows XP Professional 5.01.2600 (Service Pack 3)
Platform Compliance : x86
SiSoftware Sandra SystemManufacturer : Hewlett-Packard
Model : HP Compaq 6720sFamily : 103C_5336ANVersion : F.09
Serial Number : CNU7471JMBID : 9168B059-11E015B3-996D9C32-29AD4A0ESKU
Number : GR850ES#ABB
System ChassisManufacturer : Hewlett-Packard
Type : NotebookCan be locked : NoSerial Number : CNU7471JMB
Asset Tag : CNU7471JMB
Boot-up State : Safe
Power State : SafeThermal State : Safe
Security State Mainboard
Platform Compliance : Intel Centrino Mobile Technology
Manufacturer : Hewlett-Packard
Multi-Processor (MP) Support : NoModel : 30D8Version : KBC Version 83.0E
ProcessorModel : Intel(R) Pentium(R) Dual CPU T2310 @ 1.46GHzSpeed : 1.46GHzCores per Processor : 2 Unit(s)Threads per Core : 1 Unit(s)Type : Mobile, Dual-CoreInternal Data Cache : 2x 32kB, Synchronous, Write-Thru, 8-way, 64 byte line sizeL2 On-board Cache : 1MB, ECC, Synchronous, ATC, 4-way, 64 byte line size, 2 threads sharing SystemSystem : Hewlett-Packard HP Compaq 6720sPlatform Compliance : Intel Centrino Mobile TechnologyMainboard : Hewlett-Packard 30D8Bus(es) : X-Bus PCI PCIe IMB PCMCIA USBMulti-Processor (MP) Support : NoMulti-Processor Advanced PIC (APIC) : YesSystem BIOS : Hewlett-Packard 68MDU Ver. F.09Total Memory : 1.99GB DDR2 SO-DIMM ChipsetModel : HP Mobile PM965/GM965/GL960 Express Processor to DRAM ControllerFront Side Bus Speed : 4x 133MHz (532MHz)Total Memory : 2GB DDR2 SO-DIMMShared Memory : 8MBMemory Bus Speed : 2x 266MHz (532MHz) Video SystemAdapter : Mobile Intel(R) 965 Express Chipset Family (384MB DDR2, 400MHz, PCI, PS3.0, VS3.0) Storage DevicesTOSHIBA MK1237GSX 120GB (SATA150, 2.5", 5400rpm) : 112GB (C (D (EOptiarc DVD RW AD-7560A (ATA, DVD+-RW, CD-RW, 2MB Cache) : N/A (FKHQV 2RC1ER41Q (SCSI, BD-R, HD-DVD-R, DVD+-R-DL, CD-R) : N/A (H
03-31-2009 03:53 PM
04-01-2009 03:04 AM - last edited on 04-01-2009 01:01 PM by WendyM
12 months is about the time most notebooks get to the point where the internal fans, filters and exhaust vents become clogged with enough dust and dirt to cause significant overheating. This is the reason your fan is working overtime, and why your battery drain is higher - the fan is always on due to the overheating.
Before starting, make sure you have at least 2 or 3 cans of computer rated compressed air in a can for cleaning. You want more than one so you can do everything in one shot without having to wait for 1 can to warm up after getting too cold to work.
Before taking the covers off and blowing it out (NEVER use a vacuum - normal vacuum's are not ESD rated, and the laminar air flow at the tip of the nozzle creates serious static buildup), first try blowing out the exhaust vents and the fan intakes on the bottom of the unit. Keep in mind also that when you're working, you need at least 1/4" of space underneath the unit to allow enough air to get to the intakes or overheating is a certainty. All you need to do is have a thin, flat, hard surface underneath for the system's feet to sit on.
Make sure unit is plugged in and running so that any dust that is dislodged at the intake will be blown through to the exhaust and assisted by the fans. Blow the dust out of the intakes, then the exhaust vents. When blowing air into the exhausts, point the exhausts toward the floor or whatever surface it was sitting on and blow up into the vents so that any hard dirt can fall out.
If your system is overheating that much, just doing that probably won't do enough to reduce the overheating. At some point you'll have to take the cover off and blow it out good. When you do, make sure that you also blow out the fan bearings - dust and dirt in the bearings are what cause them to wear out faster. Don't forget the CPU and GPU either.
The link to the PDF manual for your system is here: HP Compaq 6720s Notebook PC Service Manual
Normally for most HP notebooks you only have to remove the top cover and sometimes the keyboard to get to the fans, vents and filters. Use a muffin pan or my favorite, a 3" strip of Blue Masking tape that's been folded over at the end and stuck to a piece of paper or light folder cardboard with the sticky side out. Label the screw locations on the cardboard, and stick the screws and washers/plugs to the tape as you remove them. Make sure you tape the cardboard to the surface it's on or you run the risk of knocking it over - along with the parts. Remove only what you need to access the fans and vents. If you have a Honeywell air filter or fan around, it's good to have one blowing over the area you're working, unless you like choking on the dust you'll be blowing out. If you want to use a vacuum to collect dust that's blown out you can, just make sure it's a comfortable distance from any circuit boards. Keep the system plugged in to the AC adapter while you've got it opened up - it'll keep it grounded (assuming it's plugged into a 3 prong outlet).
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