Hello the speaker on my viewsonic vg700b are not working is there anyway to fix that?

If you are going to DIY and already try the monitor with another PC, and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed VIEWSONIC monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

the old monitor is old square screen
you PC , PnP plugs and plays that reloc
and sets the GPU chip to use that tubby shape
then you extend it and expect 16x9 wide video
dump the VG700b in the trash, move on. and up 2011 newer wide screens.
old is 1280x1024
, max, called tubby. a blast from the past. and no fun./
SXGA 5:4 aspect ratio is not 16:9 OR 1080p
see them all here.

https://en.wikipedia.org/wiki/Display_resolution

YOUR USING PROJECTION SYSTEM NEW
WITH RELIC MONITOR. OOPS./

bump. i have the same problem except it's the volume that pops up

First make sure that you are using the mini stereo male phome jacks on both ends, one end is connected to the Green audio line in of the monitor, the other end should be connected to the Green audio line out of the PC, also need to set the volume controls at the PC and the monitor, starting at 1/2 level. You can also verify that the monitor amplifier is wprking or not by feeding it with an MP3 player or some kind of audio source to see if you do get the sound OK.

Press Fn F4 when computer is on.
Hope this helps ^^. Please dont forget to rate, Thanks

Change screen resolution and color settings from the 'display settings' area within the operating system.

there's an internal hardware problem in your lcd monitor - cold soldered / defective electronic part/s. I suggest to bring the unit to an authorized service center for proper diagnosis & fix the problem. best regards

Have you found a solution?
I have the same problem

Yes, is the speaker wire connected to your pc?

for whatever reason you have lost your blue gun. it could be a matter of an adjustment or a defective component in the blue video driver. take it to have it serviced.