Trouble with VAGP IC7-G

[ACat]

Hi! I have just tryed to mod my IC7G mobo. Did the capacitor mod and the VAGP mod from Hipro5:s guide. I have cleared my cmos and tried to start the system. Fans come on but no picture. Measured the VAGP on the RF choke and it measures 1.65V. This seems a bit high considering i have the 200 ohms trimmer set to 200 ohms. Soldered the one of the pins on the burns vr to the center pin and grounded it and soldered the second pin to the 10 ohm resistor over the cut trace. Cant figure out why it dont start up. Any ideas? Help is appreciated. :confused:

[Malves]

Looks like you messed something up. For this mod the trimmer should be set at 0ohms to start, not 200ohms. Also, you may wanna try doing the vagp mod like this...

http://www.xtremesystems.org/forums/attachment.php?attachmentid=32091&stc=1

[ACat]

Hi Malves! :) Yee I figured that some thing is messed up. :slapass: But the way I have done the mood I think the vr should be set to max resistans. Soldered a 10 ohm resistor over the cut trace. Soldered the vr from the resistor to ground at the right leg of the three legged thing, you have marked it 1. So when I reduce resistans volts go upp. Unsoldered everything and soldered a wire over the cut trace, volt came down to 1.57 V. But no picture. Removed the northbridge fan everything looks okey. Checked the capacitors which I soldered my 2200µF 6.3V capacitor, they also look okey. Could damaged capacitors here cause mailfunction? I´m lost here...

[enzoR]

no thats couldnt be. DO you see damages on the SMD capacitors. what about static? no error codes? try reseating everything

[ACat]

I think the SMD capacitor where I soldered the - of the 2200µF cap might be damaged. May this hinder the computer to boot? Maybee I should try to unsolder some from my old burned IC7 and replace them?
Static? I dont understand what you mean. I dont get a picture when powering on the system. Fans come on voltages appears to bee correct. Just no picture. something is wrong and I´m pretty confident my soldering messed something up. Tried two graphic cards and tested the screen just to bee sure they still work, they are okey. The 1.65 V to the northy is just a little higher than what it has been running unmodded. Had my VAGP at 1.65 V before. And dont think that has damaged anything.

[persivore]

I've heard of cap mods stopping a board from booting before, and when they are removed it booted fine. How many extra caps did you add, and what value are they? Also, are you using quality low ESR caps?

[ACat]

Hi persivore! I have just used one cap to filter spikes to the northbridge. It´s a 2200 µF 6.3 V Rubicon cap used to filter the VCORE on my burned IC7 so it should be fine to filter the northbridge. I´m gone try to take it off and se what happens.
The agp mod should only influence the voltage to the AGP bus, right? Since the volts are fine it should not be the issue here? Or have I missed some fundamental thing? Since I seem to get a nice volt to the AGP bus that mod is most propobaly okey.

[persivore]

That capacitor sounds ok :)
As long as you are getting the correct Vagp, there shouldn't be a problem with the AGP voltage (unless it spiked too high at some point and damaged something)

[ACat]

Removed the cap and the system booted just fine. :banana: Tried the VAGP mod and it works a charm. Think I am going to try solder an other cap to filter the northbridge. Something is wrong with the one I just tryed. Its great to have found the fault! Thanks for all the help! ;) Was begining to think my board had went were my old IC7 went. To the motherboard grave yard, ohhhh scary place. :p: :cool:

[ACat]

Soldered another Rubicon cap on to better filter the northy, this time everything works! :toast: Time to se if there is any improvment.

[ACat]

The cap and VAGP mods helped stabilise the fsb. Can run fsb 260 stable now in 5:4 CPU:Ram ratio. My cpu gets a bit to hot tough, mbm5 temp at 75 degres Celcius. Havent tryed anything higher. My ram still cant go past 225 MHz 2-2-2-5, think they need more than 2.9 V for that. Maybe a Vmem mod is in place? :p: