Thursday, December 7, 2023
Tuesday, May 3, 2011
Friday, February 19, 2010
Friday, December 25, 2009
To delete partitions on a hard drive:
Boot to Win98SE startup disk (It is the best OS made boot disk ever). Type in debug at the A: prompt.
Enter in the following commands:
Blue: what you type in.
Pink: what is displayed on the screen. (DO NOT TYPE THIS IN!)
Red: this is useful information. (DO NOT TYPE THIS IN!)
-----------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------
-F 220 L1000 0 (ENTER)
-A CS: 100 (ENTER)
xxxx:0100 MOV AX,301 (ENTER)
xxxx:0103 MOV BX,200 (ENTER)
xxxx:0106 MOV CX,1 (ENTER)
xxxx:0109 MOV DX,80 (ENTER) <---"80" for hd1, "81" for hd2 >
xxxx:010C INT 13 (ENTER)
xxxx:010E INT 20 (ENTER)
xxxx:0110 (ENTER) <-------BLANK LINE "VERY IMPORTANT" >
-G (ENTER)
Program terminated normally
- (CTRL)-(ALT)-(DEL) to reboot system
Enter in the following commands:
Blue: what you type in.
Pink: what is displayed on the screen. (DO NOT TYPE THIS IN!)
Red: this is useful information. (DO NOT TYPE THIS IN!)
-----------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------
-F 220 L1000 0 (ENTER)
-A CS: 100 (ENTER)
xxxx:0100 MOV AX,301 (ENTER)
xxxx:0103 MOV BX,200 (ENTER)
xxxx:0106 MOV CX,1 (ENTER)
xxxx:0109 MOV DX,80 (ENTER) <---"80" for hd1, "81" for hd2 >
xxxx:010C INT 13 (ENTER)
xxxx:010E INT 20 (ENTER)
xxxx:0110 (ENTER) <-------BLANK LINE "VERY IMPORTANT" >
-G (ENTER)
Program terminated normally
- (CTRL)-(ALT)-(DEL) to reboot system
Thursday, May 21, 2009
Understanding VPNs and the VPN Gateway
Virtual private networks (VPNs) enable users to connect to a remote private network through the Internet. Virtual private networks therefore span the Internet because the user connects over the Internet to the remote VPN server. With a VPN, data is first encrypted and encapsulated before it is sent to the remote VPN server. When the VPN server obtains the data, it decrypts the packet so that is can be interpreted.
VPNs are usually implemented to provide for the following scenarios:
Enable remote access users to connect to and access the network.
Provide connectivity between two or multiple private networks or LANs.
A VPN gateway, also called a VPN router, is a connection point that connects two LANs which are connected by a nonsecure network such as the Internet. A VPN gateway therefore connects to either a single VPN gateway, or to multiple VPN gateways to extend the LAN. This scenario is typically referred to as a router-to-router VPN. The corporate networks are connected through the VPN servers running Routing And Remote Access (RRAS). The actual medium that connects the LANs is usually the Internet. This means that the VPN gateway or router will be configured with the address on the LAN that it is connected to, and a public IP address.
VPNs are usually implemented to provide for the following scenarios:
Enable remote access users to connect to and access the network.
Provide connectivity between two or multiple private networks or LANs.
A VPN gateway, also called a VPN router, is a connection point that connects two LANs which are connected by a nonsecure network such as the Internet. A VPN gateway therefore connects to either a single VPN gateway, or to multiple VPN gateways to extend the LAN. This scenario is typically referred to as a router-to-router VPN. The corporate networks are connected through the VPN servers running Routing And Remote Access (RRAS). The actual medium that connects the LANs is usually the Internet. This means that the VPN gateway or router will be configured with the address on the LAN that it is connected to, and a public IP address.
Friday, February 20, 2009
MONITOR SMPS
MONITOR REPAIR LESSON
Troubleshooting a dead monitor
Checking the primary side
If the monitor is dead the first thing to do is to verify if there is voltage on the drain of the switching FET of the main power supply
In case there is not voltage, you have to seeking for some open thing like blown fuse, resistors or broken traces.
The normal voltage on its drain is about 150V when the monitor is plugged to a 120V AC outlet (USA users) or 300V when the monitor is hooked to a 220V AC outlet (UK users)
Troubleshooting a dead monitor
Checking the primary side
If the monitor is dead the first thing to do is to verify if there is voltage on the drain of the switching FET of the main power supply
In case there is not voltage, you have to seeking for some open thing like blown fuse, resistors or broken traces.
The normal voltage on its drain is about 150V when the monitor is plugged to a 120V AC outlet (USA users) or 300V when the monitor is hooked to a 220V AC outlet (UK users)
Wednesday, December 3, 2008
Friday, October 3, 2008
Wednesday, October 1, 2008
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