Go Back   Hardware Canucks > HARDWARE > Video Cards

    
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old September 12, 2011, 09:00 PM
Rookie
 
Join Date: May 2009
Posts: 42
Default video card repair for ati 4890

so my little brother decided to do build a computer from my spare parts.. when he was putting the videocard (out of warranty ati 4890 oc) he noticed "something" fell off.. see below



im not much of an electronics expert but i think its a 330uf 16v capacitor as seen below.. not sure if its a specific type and what not




my question can it be re-solder back to its place without running into problem or do i need to find a replacement capacitor? and if i was to replace it can any 330uf 16v capacitor will do?



any help is appreciated.. thanks
Reply With Quote
  #2 (permalink)  
Old September 12, 2011, 09:05 PM
supaflyx3's Avatar
Hall Of Fame
F@H
 
Join Date: Jun 2010
Location: Chilliwack BC
Posts: 2,556

My System Specs

Default

In theory it should work.. but with that much effort might as well just buy another one for around 50-60.
__________________
Reply With Quote
  #3 (permalink)  
Old September 12, 2011, 11:36 PM
Mook06's Avatar
Top Prospect
 
Join Date: Dec 2009
Location: Vancouver Island
Posts: 114

My System Specs

Default

this is totally repairable, i have done it twice on vid cards, old one solders out, new one solders in, can be done with almost any soldering iron

on the pcb there will be a circle around the cap mounting area, one side will be solid color like the blue on the top of the old cap, this represents negative and should match orientation with the new cap

for the replacement cap rule of thumb is match capacitance exceed voltage (im not actually 100% on if this is correct or not but it has worked out for me in all cases) so something like 330uf @ 20v

solder out the old pins, solder in the new cap, make sure to not put to much heat into the pcb
Reply With Quote
  #4 (permalink)  
Old September 12, 2011, 11:52 PM
Hall Of Fame
 
Join Date: Oct 2007
Posts: 1,588
Default

the cap doesn't look broken / burnt though, I'm sure you could just solder it back on easy
Reply With Quote
  #5 (permalink)  
Old September 12, 2011, 11:57 PM
Mook06's Avatar
Top Prospect
 
Join Date: Dec 2009
Location: Vancouver Island
Posts: 114

My System Specs

Default

one leg looks awfully short though, you could salvage a cap from old components also, i have a bag of rubycons from old mobos
Reply With Quote
  #6 (permalink)  
Old September 13, 2011, 12:52 AM
Hall Of Fame
 
Join Date: Dec 2008
Posts: 1,515

My System Specs

Default

Solder a small piece of wire onto the short leg and then solder it onto the card.
__________________
For my part I know nothing with any certainty, but the sight of the stars makes me dream.
Reply With Quote
  #7 (permalink)  
Old September 13, 2011, 11:35 AM
Perineum's Avatar
Hall Of Fame
F@H
 
Join Date: Mar 2009
Location: Surrey, B.C.
Posts: 4,049

My System Specs

Default

Quote:
Originally Posted by Mook06 View Post
on the pcb there will be a circle around the cap mounting area, one side will be solid color like the blue on the top of the old cap, this represents negative and should match orientation with the new cap
... and make sure to compare polarity with other caps on the card as well. Some PCBs have the markings backwards.

Quote:
Originally Posted by Mook06 View Post
for the replacement cap rule of thumb is match capacitance exceed voltage (im not actually 100% on if this is correct or not but it has worked out for me in all cases) so something like 330uf @ 20v
Same type of capacitor (IE: poly or lytic) is important. Capacitance should be the same or very close. Voltage has to be the same or higher. Higher voltage caps get bigger really quick, then physically do not fit the spot anymore. Other than that, I don't believe there is any problem with higher rated caps for voltage.

Quote:
Originally Posted by YukonTrooper View Post
Solder a small piece of wire onto the short leg and then solder it onto the card.
It would have to be a long piece of wire or it would unsolder and possibly short itself when he was trying to put it back on the board.
Reply With Quote
Reply


Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
4890 1GB Card with Q6600 - What to Upgrade To? amorak Video Cards 15 May 22, 2010 06:18 AM
[FS] Selling Video Cards!!! 4890, 4870, 8800GT-OC Caldezar Buy/Sell & Trade 28 January 1, 2010 08:10 PM
[WTB] 4870/4890 video cards Cowboy Buy/Sell & Trade 1 June 7, 2009 11:59 AM
Tutorial: Repair your noisy cpu, system and video card fans nork Guides & How-to's 11 March 16, 2008 11:03 AM