PC malware appears to have toasted bios.. How can I recover...

I have a customers Dell Dimension 8400 desktop PC.. They complained of problems with Internet access..  I ran Malwarebytes first to see what I would come up with.. It picked up various (24) hits, mostly adware, a couple of trojans, and a few registry changes... I went ahead and let Malwarebytes clean it up as I had done many times before with good results.  It cleaned them and said it needed a reboot to complete the cleanup... I did the reboot and the system locked up with the Windows message "Windows is shutting down".  It sat there for over 20 minutes, so I decided to power off manually.  On restart the unit never goes through the BIOS part of bootup, it simply displays the message... "RV100 P/N 113-85504-102 DDR with DLL BIOS".  I cannot get it to go into BIOS setup using the typical FKeys or esc.  Any suggestions?
Thanks,
dwar08Asked:
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scottthefishCommented:
Can you get into safemode  (F8) and do a restore?
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MikeKaneCommented:
Contact Dell tech support.   Even if the unit is out of warranty, they will still assist with over the phone help even if they will not replace any of the hardware.  

IMHO, if the machine will no boot to BIOS, its pretty dire.  

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Lee W, MVPTechnology and Business Process AdvisorCommented:
Pull the installed graphics card and reseat it (or try using the onboard card, if there is an onboard card).
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dwar08Author Commented:
Can't get to safemode.... Can't even get to boot to BIOS...

It had a suspected video card problem also, so I installed an old generic ATI PCI card that seemed to work fine for testing anyway... Funny you should mention the Video card...  I don't have another card to test with, but I pulled the card and put it in a different slot.... The original card just displays a blinking dash (cursor) in the top left corner but I can't tell that the system is booting with it in... (No hard drive activity)... I'll see if I can come up with another video card for testing....
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jamietonerCommented:
when it's stuck on this screen what do the diag leds on the back display?
http://support.dell.com/support/edocs/systems/dim8400/SM/adtshoot.htm#wp1052387
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dwar08Author Commented:
ABC are Green and D is Yellow....
Haven't changed any cables, drive or other hardware other than the video card...
D
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dwar08Author Commented:
I've pulled all the cards that are not needed... ie... sound card, modem, etc... No additional cards other than the  motherboard.... There is no integrated video card on the MB...
D
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jamietonerCommented:
Unplugg the data cable and power cable to the hdd and see if you get a no boot device error.
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dwar08Author Commented:
Pulled the data and power cable to the HDD and get same error... "RV100 P/N 113-85504-102 DDR with DLL BIOS".
D
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jamietonerCommented:
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dwar08Author Commented:
reset bios defaults  using cmos jumper as described.... no change... same error on POR  "RV100 P/N 113-85504-102 DDR with DLL BIOS".
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jamietonerCommented:
How many sticks of ram are installed?
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dwar08Author Commented:
two sticks...
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dwar08Author Commented:
I see where you're going with this.... Although I'm not sure why there would be a memory problem out of the blue, the error does possibly indicate that with the "DDR with DLL BIOS"  statement....  I'll check into that....
D
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jamietonerCommented:
Usually the diag leds help alot but gggy can be many things. try the system with just whats required to post(not boot) the system. Power, cpu, 1 stick of memory, video card, mouse, keyboard and monitor, disconnected everything else like cdroms, floppy drives hard drives, usb devices, etc. when you turn it back on right after the 3 lock lights flash(caps, num and scroll) start tapping f12 and see if you get the boot options menu.
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crabstixCommented:
If it were a PC I was working on I would have called it ages ago. Sounds like the motherboard/bios has failed and Id hedge my bets that it was just damn coincidental timing with the malware thing too. Always sucks when that happens...

Most Dells have diagnostic lights on them.... What are they doing???
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nobusCommented:
try resetting the bios, by removing the battery for a lminute - be sure to disconnect the AC first !!
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dwar08Author Commented:
Bad Memory Stick... It's pretty coincidental that it happened when it did.... Threw me off track...  Still have some issues with the malware, but I can deal with that.... Going to reload the O/S..
Thanks for your help...
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scottthefishCommented:
Right on jamietoner. Sounds silly, but I've seen bad RAM cause all kinds of stupid stuff without any memory beeps or warnings. Before you throw it away, you should try some RAM sticks that are known to be good.
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jamietonerCommented:
You're welcome.
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