Archive for August, 2006

DD-WRT Firmware on the Belkin F5D7230-4 v1444

August 21st, 2006 No comments

I have a Belkin wireless router (model number: F5D7230-4 v1444). For some reason, the “Virtual Server” (or “Port Forwarding”) did not work correctly. It’s obviously a firmware problem. I checked the firmware version and my router had the latest firmware from Belkin. I wrote to Belkin Customer Service but who knows how long I have to wait to a response from them.

Thus I tried to find a custom firmware for my router on the Internet and I came across a firmware project called “DD-WRT“. The project was targeted at making custom firmwares for Linksys WRT54G/GS routers. However, there is a micro version which can be used on Belkin F5D7230-4 v1444. I decided to give it a try.

I downloaded the latest generic micro version of DD-WRT and flashed it to my router. After flashing, the “Virtual Server” on my router works perfectly and that’s why you can read this post. There are lots of features in DD-WRT firmware and I have not scratched the surface yet.

One thing to note is that the flashing was not an easy task. The DD-WRT Wiki has one section devoted to the installation on the Belkin F5D7230-4.

Instructions on how to flash the Belkin F5D7230-4 v1444:

  1. Download the latest generic micro firmware (dd-wrt.v23_micro_generic.bin as of this writing).
  2. Reset router to factory defaults. Unplug the router.
  3. Connect your computer directly to one of the LAN ports on the router.
  4. The router starts up with IP address Set your computers IP address manually to the following setting: IP Address:, Subnet Mask:, Default Gateway: leave blank.
  5. Go to and goto their download page. (You may want to do this first before you reset to the factory defaults in case resetting screws up your internet connection.)
  6. Download the firmware for BEFW11S4 – EtherFast Wireless AP + Cable/DSL Router w/4-Port Switch.
  7. Extract the Tftp.exe program from the zip file.
  8. Start Tftp program and set server to: and for the file part, put the location of your “dd-wrt.v23_micro_generic.bin” file.
  9. Set retries to 20.
  10. Power up router.
  11. Click upgrade and then hit the reset button on your router. If program doesn’t catch the Belkin’s tftp window, just hit reset again. The Tftp program will let you know when it is upgrading and succeeds.

DVI Recovery for Viewsonic VX2025wm

August 20th, 2006 No comments

I had a big issue with my computer monitor yesterday: the DVI port of the monitor stopped working all of a sudden. The monitor is a Viewsonic VX2025wm 20.1″ widescreen LCD. I have had it for a few months and the DVI port had been working perfectly until yesterday. I have two desktop computers which are sharing the Viewsonic monitor. I was switching the monitor connection between them yesterday afternoon. And all of a sudden I got a black screen (on both computers) and the monitor told me “No Input Signal”. I tried rebooting both computers but no go. There was nothing on the screen.

Since Viewsonic VX2025wm also has a VGA port, I dug out a VGA cable and connected the computers to the monitor via VGA. The funny thing is the monitor worked just fine on VGA with both computers. I thought to myself that the DVI port on the monitor might get fried.

After some googling I found out that some people are having this exact same problem. Here is a link on [H]ard Fourm: VX2025WM problems?. In this thread it is mentioned that some Dell LCD monitors are experiencing this problem and Dell has come up with a solution. The solution can be found on Dell Support Forum and here is the link.

Basically what happened was that my NVidia vedio card messed up with my LCD monitor’s EDID and put the monitor in a permanent DVI Power Save Mode. The solution is simple. Just download this ZIP file and follow the instructions below. Then you will have a working DVI input.

Instructions on how to recover the DVI port (note: these instructions are copied from Dell Support Forum):

The ZIP file will contain DVI_Recover_FLOPPY.exe and DVI_Recover_CDIMAGE.iso:

  • If you have a floppy drive, place a blank floppy disk in the floppy drive and run the file DVI_Recover_FLOPPY.exe. This will create a bootable floppy disk. Continue with the steps below.
  • If you do NOT have a floppy drive, you will need to burn the ISO image DVI_Recover_CDIMAGE.iso onto a CD-R or CD-RW disc. The procedure for this varies from software to software. In most cases, your software will have an option for “Burn Image” or “Write Disc from Image,” which you will choose. Ensure the software is looking for .iso files, browse to the location that you extracted the files from the to, select the file DVI_Recover_CDIMAGE.iso, and complete the image burning process. If your installed software does not have image burning capabilities, the Demo version of Nero 6 may contain that functionality.
  • IMPORTANT: If you only have a CDROM drive, configure your system to boot from the primary optical drive. See this Dell Knowledge Base for further information.

After you have the bootable floppy disk or CD-R/RW ready, perform the following steps to resolve the problem:

  1. Using the VGA cable provided with your flat panel, connect the monitor to the VGA port on your video card. Ensure that the connection is successful and that you can change the monitor’s input to VGA and receive an image.
  2. Download and install the latest nVidia ForceWare drivers here. This will prevent occurrence of the problem once you have used the rest of this procedure to correct it.
  3. If you do NOT have a floppy drive, and are going to be performing the fix using a recordable CD created with the DVI_Recover_CDIMAGE.iso, insert your recorded CD into the primary optical drive now.
  4. Shut down the computer. Disconnect the power cables from both the monitor and the computer.
  5. Disconnect the VGA cable, and reconnect the monitor to the computer via the DVI cable.
  6. Press the power button for both the monitor and computer while unplugged to drain any remaining power.
  7. Re-attach the power cables to both the monitor and the computer.
  8. If you have a floppy drive, insert your bootable floppy into the floppy drive and power on the system. Otherwise, simply power on the system.
  9. The system will boot to the floppy or recordable CD. Wait for approximately one (1) minute. You will not notice any major indicators that the fix is progressing; it is important that you allow the program to attempt to fix the flat panel undisturbed.
  10. Remove the floppy disk or recordable CD, and power down the system.
  11. Power up the system, and test your DVI connection.

If your monitor is still stuck in DVI Power Save mode, boot to the floppy disk or recordable CD again as described above. It may take up to three tries total in order to enact the fix.