• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

Compaq motherboard and the black screen of doom

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.

UNIXorn

Registered
Joined
Apr 7, 2002
Location
PA
Newbie here. I decided to dive into the guts of my machine today. I removed the insulation pad from my heat sink with kerosene, and removed the remaining residue from the CPU with rubbing alcohol (wouldn't try the kero on the CPU, it doesn't evaporate well) OK, here goes. I did the pencil trick on my AMD Duron 700. The system booted seemingly normal except the monitor would not come on, black screen. I then changed the jumper setting on the motherboard from 100 to 133, this only worsened the situation as it wouldn't boot correctly at all. I went back and removed the CPU and erased the pencil tracks and set the jumper back to 100 MHZ. Everything is back to normal now. The question is, what am I missing? What did I do or not do correctly? The motherboard is a Compaq Presario 5WV232 except it is fed by a 300w power supply now. 384 MB RAM and Redhat Linux 7.2. Everything else is stock.
 
OP
U

UNIXorn

Registered
Joined
Apr 7, 2002
Location
PA
Ah, there is also a jumper that controls CMOS, I can "clear CMOS" or "normal operation" To add to my question, there are no controls on the BIOS screen for the CPU, just a window that describes system settings, but you can't change that. There are only adjustments for the harddrives, CD ROM, date/time.....So with that, if I did the pencil trick would I actually have to do anything else?
 

Tiger

Member
Joined
Apr 6, 2001
Location
UK
What you did was take the default clock speed 7 (multiplier) x 100 ( front side bus) = 700 and increased it to 7 x 133 = 931. It sounds like it would not take that overclock.
You are a bit stuck if you don't have the ability to alter the multiplier or the FSB in the bios because those are the controls that you need to do a controlled overclock. Unlocking the proc will only help if you are able to change the multiplier in the bios.
 
OP
U

UNIXorn

Registered
Joined
Apr 7, 2002
Location
PA
I see, that would make sense having no control over it in BIOS. Thanks for the help.
 

FRANK

Senior Member
Joined
Jan 23, 2001
Location
Pittsburgh Pa
First of all, Welcome to the forums.

If you have no adjustments available in the BIOS nor the appropriate jumpers on the motherboard itself, you still have the option of altering the CPU itself.

This may be a bit beyond your ability at this point and if you haven't got a spare CPU nor care to purchase another if you damage the CPU, you may not want to try it. The following link will take you to a site that shows you which bridge needs cut or closed to achieve whichever "default" setting you're after; http://www.ocinside.de/index_e.html?/html/workshop/socketa/socketa_resistors.html

I don't know how much experience you have in this black art of overclocking, but you may want to visit the "Beginners Guides" located on the front page of this site, follow this link; http://www.overclockers.com/topiclist/index04.asp#BEGINNER GUIDES

Stop back and let us know how it goes.

Good Luck!