Cant get My dell Dimension b110 to boot no display on moniter!

This motherboard uses inter-leaved RAM and RAM needs to be installed in pairs.
Check the BIOS RAM settings.
Try and use the same make of RAM.
One of the RAM modules may be faulty.
Try inserting the RAM module that was in slot 3 to slot 1

take a look inside ..maybe wires are loose or something like that .. and while you are doing that ..remove the ram memory also ..and check them one by one ..and see if it boot-up or not ..also remove the bios battery and place it back ..If by mistake you selected something in bios related with the power button or the way it will boot up ..this will default the bios and will get it back to the factory settings ..and it may work if it is something related with it ..
Otherwise..I can not see what the issue may be ..but a faulty motherboard..or something related with the cpu ..try to see if the fan is working ..If this is unplugged or malfunctioning ..it will cause the cpu to stop the boot up ..

First thing I would do is take the desktop outside and clean it out with two cans of compressed air.

HEAT can really slow a machine down. Let me know if that makes a difference (good to do either way) and we'll go from there.

Make sure the ram is installed correctly. You didnt break it when you put it back in did you ...

If you get it going again... please go to www.4allmenmory.com and have them scan your computer. Review their results and recommendations

Im sorry their computer isnt working.

Thanks for using fixya.com

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Check first if the memory is loose or there are any parts that have come loose such us IDE or SATA cables, For errors you should also get warning sounds.

Seeing as the message is indicating a problem at one of the timer checkpoints, fatal is probably an accurate description. You are most likely looking at a motherboard replacement scenario. I've seen improperly seated memory modules toast timer circuitry on old boards back in the days when most of the timing circuitry was constructed from discrete components, not entirely IC-based timing solutions, but I have never seen it happen on modern boards.

Turn the computer on.
Immediately press the F10 key, repeatedly,
until the computer enters "SETUP" mode.
Then, change the "boot order" (or "boot priority") to select the CD-ROM device.

Hi,
 
The diagnostic codes you mentioned A & B amber C & D green indicate that the issue is related to the memory. Reseating the memory firmly resolves this issue. Most times the memory needs to be firmly pressed in till the latches click.
 
Below is the link to the No Power, No POST, No Video troubleshooting.
http://support.dell.com/support/topics/global.aspx/support/dsn/en/tree?c=us&l=en&s=gen&journalid=&treeid=011360B8243248349C306481A954B356&Query=&SystemID=&ServiceTag=&contenttype=&os=&component=&lang=&doclang=en&toggle=&dl=false
Follow all the steps and if there is no hardware failure, this will definitely resolve your issue.
 
Hope this helps. Please rate your feedback!
Thanks,
VJ

while the pc is booting up hit F8, it should take you to a sub menu, choose "last known good configuration" and hit enter, see what it does.

post back please

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