Wednesday, January 27, 2010

nvidia based laptops are prone to problems?

This article is about the HP tx2000 but the root cause appears to be an overheating NVIDIA graphics card and chipset . This seems to be a common cause of recalls among other brands like sony and dell
in reference to:
"overheating NVIDIA graphics card and chipset"
- HP tx2000 suffering from dead screens and wireless, NVIDIA to blame? -- Engadget (view on Google Sidewiki)

Why locally sold cars are still better than grey-market options

This is an excellent article showing the dangers of buying grey market cars versus locally available cars.

But still, the allure of driving a very uncommon model is still there
in reference to:
"Why locally sold cars are still better than grey-market options"
- Business - Why locally sold cars are still better than grey-market options - INQUIRER.net (view on Google Sidewiki)

redecorating

I've changed the layout and colors of my blog. I like blue.

Hope you like the new colors.

For hard to remove viruses - safe mode

In general, for hard to remove viruses, scan in safe mode/first boot

I've seen only one AV that was intelligent enough to say "hey boss, I cant remove this virus, do you want to reboot and scan in first boot mode?"

IMHO this should be standard for all antivirus programs, even antispyware programs

I'm not sure if "first boot" is the correct term. It means the AV loads and runs its virus scanner to scan the entire drive as the first program that runs after the OS core loads, before any virus has a chance to load, even before the desktop loads. Anyway, AFAIK its very hard to go to first boot manually so safe mode is used.

If you boot in safe mode, only the OS core, desktop and little else is loaded. There is little chance of the virus loading when you boot in safe mode unless you manually run it.

In first boot mode and in safe mode, the virus is not in ram, only on disk. It is then vulnerable. If it was in ram, it could easily save another copy after the AV deletes the copy on disk.

ACER Aspire 4740 - 432G32Mn

If you remember my old post here, I'm planning on replacing my 2006 vintage laptop sometime this year.






CPU:Intel Core i5-430M 2x2.26GHz(1066 MHz / 3MB L2 Cache)
MEMORY: 2048MB DDR3 /PC 8500 - Bus 1066Mhz

HDD: 320GB HDD /SATA 150 - 5400 r.p.m./ Chống sốc HDD
OPTICAL: DVD±RW Double Layer ( Đọc và ghi đĩa DVD 2 lớp 8GB )
DISPLAY:
14" W/XGA LED Blacklight 16:9 CinerCrystal/ Màn hình Gương
VGA:
Intel X4500MHD upto 796MB
WIFI: Intel PRO Wireless Lan 802.11b/g/ Bluetooth /Finger Print
Weight: 2.2Kg / Card Reader, Writer 5 In 1/

OS: Linux/ Crystal Eye Camera 1.3Mp


source


unfortunately, this is so new that there are no reviews out so I need to wait for someone to check the battery life

This model is so new it isnt on the acer website.
37590 for 2 gig ddr3 ram, another 2250 for 4 gig.
AFAIK it is the first i series laptop available for sale in pampanga (SM pampanga octagon)

Since I'm not in a hurry, I might as well wait for new tech like ddr3, led backlighting, i series cpu with new mobo and idealy wifi direct, the new centrino standard and usb 3. Plus Li-ion batteries degrade even if not used so always get a freshly manufactured battery.

Sunday, January 24, 2010

powerbase c-421 - a broken example

The powerbase c-421 is probably the cheapest smart charger available in the philippines. 600 pesos, 2 AA, with trickle charge and individual charging channels.

The symptoms are the failure of the lights to consistently turn on when you plug the empty charger into 220v. If they do turn on, we tried  charging a few different known working batteries. The lights turned to red as it started charging but after < 1 min, it died.

Here are pics of the circuit board. There is nothing wrong  to the naked eye.




 

This one for some reason died 1-2 years after normal use by one of my relatives. Right now they are looking for a replacement. I suggested a Unomat UNO1900 because thats what I'm using now. Click here for the unomat PDF manual + specs.




So right now this broken charger is a paperweight. I'll make a few inquiries from electronics people but i dont think this can be repaired.

Friday, January 22, 2010

Wi-Fi Direct - no router needed

An interesting technology. Of course it has been available fro some time. Google AD-HOC wifi connections.

I hope this also includes mesh networking. Mesh networking is like If laptop A is connected to the internet by a wifi hotspot and laptop B is connected to laptop A via wifi but is too far from the hotspot, laptop B can go online by using laptop A as a repeater
in reference to: The Future of Wi-Fi is Routerless | Popular Science (view on Google Sidewiki)

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