Sunday, November 22, 2015

Dell Inspiron Desktop 20 3000 Series All-in-One LCD Backlight Issue

The Dell Inspiron Desktop 20 3000 Series All-in-One has an issue with the LCD backlight. I captured a video of the issue here.

So what happened was the system instructs the screen to turn off, which it did but then the screen (and not the system) turns back on because it needs to display the message "No input". It then just leave the LCD backlight on perpetually until the system goes to sleep.

This is similar with any other desktop system with a separate display. The AIO is just the system and display built into the same housing.

However, with traditional system, when the system is set to turn the monitor off, it will simply turn off the signal from the video output in which the monitor will detect no input and will display similar "No input" message. The difference however is that the display will normally turn off after a few seconds. In the case of the Dell, it did not.

It is clearly a design flaw which can only be solved with a new firmware for the display and not the system.

Thursday, October 8, 2015

Dell Inspiron 20 3043 BIOS update hangs

I was updating the system to A11 BIOS with the usual steps which is to simply run the downloaded exe file and wait for the process to complete with a couple of reboots when the process hangs at 65%.

As usual the warnings are clearly stated there to not power off the system while it is updating but it was simply too long a wait.

I rebooted the system nevertheless and lucky for me the system reboots back up with the old BIOS still intact although that came with an initial scare where the screen was blank right after the Dell logo and the spinning dots and I had to reboot again.

I tried updating the system for another 2 times but it all ends the same.

Reading online resources did not help much. There is also nothing much to tinker with the BIOS setup either. It seems like I am destined to be stuck with the old firmware or I could call Dell support for help and prepare to vomit blood.

It was just a hunch but I decided to run the exe file with an account that has administrative rights and right when it is rebooting, I removed all the connected peripherals like printers and keyboard/mouse and behold the update completes with no issues.

Friday, May 8, 2015

NTP vs SNTP

Simple Network Time Protocol (SNTP) is a simplified, client-only version of NTP. SNTP can receive only the time from NTP servers; it cannot be used to provide time services to other systems

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/configuration/xe-3s/bsm-xe-3s-book/bsm-sntpv4.html#GUID-01925336-4FCC-4598-9BF7-19CBD0FAEF95

Wednesday, February 25, 2015

Installing Sharepoint 2013 on Windows 2012 R2

During the software prerequisites installation of SharePoint Server 2013 on Windows 2012 R2, you may encounter an issue where the Products Preparation Tool may not progress past "Configuring Application Server Role, Web Server (IIS) Role"

To the solution to this issue is address in KB2765260 and the geez of the solution is as follows

Ensure the server has access to the Internet and open an elevated Windows PowerShell prompt on the SharePoint server (that is, Run as Administrator), and execute the following commands. You need to restart the server after that and continue with the installation

Import-Module ServerManager

Add-WindowsFeature NET-WCF-HTTP-Activation45,NET-WCF-TCP-Activation45,NET-WCF-Pipe-Activation45

Add-WindowsFeature Net-Framework-Features,Web-Server,Web-WebServer,Web-Common-Http,Web-Static-Content,Web-Default-Doc,Web-Dir-Browsing,Web-Http-Errors,Web-App-Dev,Web-Asp-Net,Web-Net-Ext,Web-ISAPI-Ext,Web-ISAPI-Filter,Web-Health,Web-Http-Logging,Web-Log-Libraries,Web-Request-Monitor,Web-Http-Tracing,Web-Security,Web-Basic-Auth,Web-Windows-Auth,Web-Filtering,Web-Digest-Auth,Web-Performance,Web-Stat-Compression,Web-Dyn-Compression,Web-Mgmt-Tools,Web-Mgmt-Console,Web-Mgmt-Compat,Web-Metabase,Application-Server,AS-Web-Support,AS-TCP-Port-Sharing,AS-WAS-Support, AS-HTTP-Activation,AS-TCP-Activation,AS-Named-Pipes,AS-Net-Framework,WAS,WAS-Process-Model,WAS-NET-Environment,WAS-Config-APIs,Web-Lgcy-Scripting,Windows-Identity-Foundation,Server-Media-Foundation,Xps-Viewer

Thursday, January 15, 2015

SLES 12 - Certifcate Authority

In SLES 12, when you create a certificate authority from scratch using YaST, all the required files will be located in

/var/lib/CAM/CA name created in YaST

which includes the certificate, key, serial, index and openssl configuration as well.

So an easier way to sign a cert in command line is to go the above directory and place the CSR there before issuing the following command

openssl ca –md ‹md -in ‹csr› -out ‹certificate› -config openssl.cnf.tmpl