Need value of resistors connected to f16-100hip bios chip

[McKay420]

@Larry Sabo can you please post the 2 pages from the schematic that we have been referring to if you still have access to it? That website seems to have removed or moved the schematic.

Also, thank you both again for your help. @Moltuae, your answers hav been very informative and detailed. You’ve really helped my understanding of how these thins work. I will try a 4.7kohm resistor on pin 6 before trying a 10ohm and I’ll be sure to let you guys know how things go.

 

[Larry Sabo]

@Larry Sabo can you please post the 2 pages from the schematic that we have been referring to if you still have access to it? That website seems to have removed or moved the schematic.

I tried but it's too large a file, even zipped. Send me your e-mail address in a PM and I'll mail it.

 

[PcTek9]

o.0 alrighty then. Somethings maybe you don't know for this type of repairs in the future. I'm glad you took photos. But if you dont know you can get home smt soldering station with hot air, or they even make these little u like heads you can stick in a regular soldering iron in kits that are different widths and lengths so you easily pop a chip on or off. They also make repair kits with extra pads. I guess that since it is an older slower bios chip, and it communicates serially information eventually to the cpu and ram. They inverted some pins output for compatability, but still 100mhz is sensitive enough to noise in my opinion, so there's reasons they have used smt resistors of those values at those frequencies. What a terrible situation to be in... I can imagine your frustration, I hope you get it repaired perfectly, goodluck.

 

[McKay420]

Thank you. A hot air station would be nice, but this is one of many hobbies so it’s hard to find that much extra money. Do you have a recommendation on a “budget” hot air station? I currently have a Hakko FX-888d which I calibrated with my multimeter before starting the repair. I set the soldering iron to 650°f because I’ve had problems in the past with scorching the components and pads. I was surprised that this happened, but I guess I wasn’t in the most relaxed mood when it happened. Although, I was very happy with how pins 1-4 turned out. At least I know I can solder some very small components accurately as long ad the pad is intact. The method that works best for me is to preload the tip, but it seems that everyone thinks it’s not proper. Is there a reason for this? Is it because the solder may de-alloy and change properties? Not sure if that’s true but I read it today. Sorry for getting off-topic.

 

[kwest]

I bow down to your soldering skills and advice in this thread. Very impressive.

 

[McKay420]

All this fuss and it's just a hobby?

Well no. At least not this project. I got stupid one night and decided to flash the BIOS with a “hacked” version for overclocking. Instantly bricked. I was in the process of adding 6gb of RAM to make 8gb. I also have a Samsung 850 Evo SATA SSD waiting to be installed to replace the 5400 rpm HDD. Plus it’s actually my mom’s work laptop so it’s a bit of an emergency. Yes I know that the “hacked” BIOS file was probably designed to brick computers because some people just plain suck..

 

[wavey]

I used a budget soldering station (Atten 8586) for 5/6 years, it was great for 95% of my soldering/de-soldering. I've moved up to a better soldering station now but I still use the Atten for hot air.
A quick ebay search found a 858D hot air rework station for £25 ($32), I'm sure it would be just fine for occasional work.