Overclock.net › Forums › Volt Mods › General Volt Mods › I need to repair a blown fan header on my motherboard!
New Posts  All Forums:Forum Nav:

I need to repair a blown fan header on my motherboard!

post #1 of 11
5/3/11 at 10:35pm
Thread Starter 
I was checking the voltages on my motherboard`s fan header with a digital multimeter and accidentaly i shorted the pins and caused a spark enough to blow it! I need to know if the transistor supplying the +12volts to the fan is still fine or what SMD compnent has been damaged? The traces on the board are still fine so if someone can tell me how to repair it i will be very grateful! the blown fan header is 4pin PWM type.

here is a screenshot of the blown fan header sys_fan2.

the header still reads the rpm speed but someone on other forums told me the mosfet transistor or the cap maybe be damaged and need to be replaced




Note: this is not a screenshot of my actual board (board is a gigabyte GA-EP45T-UD3P) i got it from google
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
post #2 of 11
5/3/11 at 10:39pm
If you put a picture of your mobo it may help people in helping you as it may or may not show the damage.
Prometheus
(13 items)
  		  
CPUMotherboardGraphicsRAM
i5 2500K @ 4.6Ghz P8P67 4870 800/1000 8GB Mushkin CL9 
Hard DriveOSPowerCase
64GB C300 SSD & Hitachi 1TB Windows 7 64bit OCZ StealthXStream 2 600W Desk Mod 
View all
  hide details  
Reply
Prometheus
(13 items)
  		  
CPUMotherboardGraphicsRAM
i5 2500K @ 4.6Ghz P8P67 4870 800/1000 8GB Mushkin CL9 
Hard DriveOSPowerCase
64GB C300 SSD & Hitachi 1TB Windows 7 64bit OCZ StealthXStream 2 600W Desk Mod 
View all
  hide details  
Reply
post #3 of 11
5/3/11 at 10:47pm
Thread Starter 
my board is in the case right now so i cannot take photos of it
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
post #4 of 11
5/4/11 at 8:01pm
If its still under warranty then I would suggest that you call in and tell them it just died on you....heheheh

then customer service be like
then he be like
finally he be like
Main Rig
(12 items)
 
XPS 17 L702x
(11 items)
  		 
CPUMotherboardGraphicsRAM
AMD Phenom II x4 955 @3.6 Asus M4A79XTD Evo Evga 660 Ti SC GSkill DDR3 1600 4x4GB @1333 
Hard DriveOSMonitorKeyboard
Intel 320S.160GB, 1T WDB, 1T F3, 3x2T F4 Windows 7 x64 Pro 2xU2311H, Cintiq 18sx. Steelseries 6Gv2 
PowerCaseMouseAudio
Antec 750TP Scythe Ikazuti S Logitech G500, Anywhere MX Mouse BX5a, Dayton SUB120, Sennheiser MX160 
View all
CPUGraphicsRAMHard Drive
i7 2670QM 2.2Ghz Turbo Boost to 3.1 Nvidia GT 555M 8GB 1333 WD32BPVT, WD10JPVT 
Optical DriveOSMonitorKeyboard
6x Bluray Win7 Home x64 Full1080HD LED LG TL(TrueLife) Full Keyboard (Backlit) 
CaseMouseAudio
Belkin Evo Backpack Logitech Anywhere MX JBL Built-In Speakers 
View all
  hide details  
Reply
Main Rig
(12 items)
 
XPS 17 L702x
(11 items)
  		 
CPUMotherboardGraphicsRAM
AMD Phenom II x4 955 @3.6 Asus M4A79XTD Evo Evga 660 Ti SC GSkill DDR3 1600 4x4GB @1333 
Hard DriveOSMonitorKeyboard
Intel 320S.160GB, 1T WDB, 1T F3, 3x2T F4 Windows 7 x64 Pro 2xU2311H, Cintiq 18sx. Steelseries 6Gv2 
PowerCaseMouseAudio
Antec 750TP Scythe Ikazuti S Logitech G500, Anywhere MX Mouse BX5a, Dayton SUB120, Sennheiser MX160 
View all
CPUGraphicsRAMHard Drive
i7 2670QM 2.2Ghz Turbo Boost to 3.1 Nvidia GT 555M 8GB 1333 WD32BPVT, WD10JPVT 
Optical DriveOSMonitorKeyboard
6x Bluray Win7 Home x64 Full1080HD LED LG TL(TrueLife) Full Keyboard (Backlit) 
CaseMouseAudio
Belkin Evo Backpack Logitech Anywhere MX JBL Built-In Speakers 
View all
  hide details  
Reply
post #5 of 11
5/5/11 at 3:34am
Thread Starter 
OK !!! i did it!! i replaced the mosfet transistor and now the fan header is back ..it`s alive it`s alive!!!
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
post #6 of 11
5/5/11 at 5:29pm
Nice gratz on the repair
Basic Thunder
(6 items)
 
HTPC
(6 items)
  		 
CPUMotherboardGraphicsRAM
e5500 Msi g41m-P25 PNY GTX 470 4 gb ddr3 mixed 
OSPower
Windows 7 Ultimate 64-bit APEVIA ATX-CB700W 
View all
CPUMotherboardGraphicsRAM
athlon 64 x2 4200+ Nodusm3 GTS 450 2gb ddr2 Ram 
CaseMouse
Emachines Cell phone 
View all
  hide details  
Reply
Basic Thunder
(6 items)
 
HTPC
(6 items)
  		 
CPUMotherboardGraphicsRAM
e5500 Msi g41m-P25 PNY GTX 470 4 gb ddr3 mixed 
OSPower
Windows 7 Ultimate 64-bit APEVIA ATX-CB700W 
View all
CPUMotherboardGraphicsRAM
athlon 64 x2 4200+ Nodusm3 GTS 450 2gb ddr2 Ram 
CaseMouse
Emachines Cell phone 
View all
  hide details  
Reply
post #7 of 11
3/2/12 at 1:09pm
Dang it! I did exactly the same thing to my Rampage III Formula! Was having issues getting the CHA FAN headers to work correctly and decided stupidly to multimeter test them all and shorted not one but two of my OPT Fan headers! Can you give me some further details on how to find and replace the component. I am fairly competent with a soldering iron! I dont really use the OPT Fan headers so not sure if I should bother or not to attempt repair.
Reply
Reply
post #8 of 11
3/2/12 at 1:39pm
Thread Starter 
Quote:
Originally Posted by frozenreads View Post

Dang it! I did exactly the same thing to my Rampage III Formula! Was having issues getting the CHA FAN headers to work correctly and decided stupidly to multimeter test them all and shorted not one but two of my OPT Fan headers! Can you give me some further details on how to find and replace the component. I am fairly competent with a soldering iron! I dont really use the OPT Fan headers so not sure if I should bother or not to attempt repair.


first take a note of the damaged MOSFET transistor part number and try to desolder one from another asus mobo. first heat up the transistor with a special heat blower for smd devices to melt the transistor legs, be careful as underneath the transistor it is spot glued and you need also to melt this glue so it can be detached from the mobo.

In my experience mosfet transistors are very sensitive to short circuits and i think you have blown it up like i did by shorting the fan header pins with the probes.

good luck in restoring back you fan header!
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
post #9 of 11
3/22/12 at 12:30pm
Sorry for the delay in response, I had attempted to send the board back for repair to ASUS and although they did not send anything to me to say they had refused to repair, the board came back unchanged. I just want to double check the faulty component with you. Basically after shorting the CPU headers any fans connected still operate but they run at their slowest speed (normally with these headers and power control switched off they operated at full speed). In this particular case my second CPU fan that I have connected to OPT_FAN1 normally runs at its fastest speed of 1900rpm, now it just runs at 900rpm. So there is obviously power getting to the CPU header but the fan will only operate at a slow speed. Any thoughts to what I have blown and need to replace? Really appreciate your feedback by the way.
Reply
Reply
post #10 of 11
3/22/12 at 1:58pm
Thread Starter 
@frozenreads what is the type of fan you are using with the blown header? pwm 4wire or standard 3pin? all i can see here is that you may need to replace the blown mosfet with a same type...then your fan will spin at full speed your mosfet is shorted and now it is supplying a lower voltage then 12v so it spins slower. if you replace the mosfet transistor with a new one and the fan does not spin full speed you may try to solder a small wire from a 12v print on the board and link it to the +12v on the header it works always like this. goodluck!
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
XTREME CORE
(16 items)
  		  
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4Ghz 1.225 VID GA-EP45T-UD3P Rev 1.0 EVGA GTX 460 SC EE 1GB 8GB Corsair XMS3 DHX DDR3 1600Mhz 
Hard DriveHard DriveOptical DriveCooling
OCZ Vertex 2E 60GB SSD Samsung SpinPoint F3 500GB Samsung SH-S223L Internal 22x SATA DVD Writer Corsair Hydro Series H100 
OSMonitorKeyboardPower
Windows 7 Ultimate SP1 x64 LG L226WTQ 22" 2ms 1680 x 1050 Trust Easy Scroll Silverline Corsair HX850W Modular 
CaseMouseMouse PadOther
CM Storm Sniper Black Edition Razer Imperator Razer Scarab BF3 Logitech HD Pro Webcam C920 
View all
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: General Volt Mods
Overclock.net › Forums › Volt Mods › General Volt Mods › I need to repair a blown fan header on my motherboard!