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On a whim I decided to grab some old old boards out of the cupboard and see if some of my more recent knowledge will help me resurect them. Why? See profile pic.
I've run though a few basics and got further then I did the last time I took a stab at this specific board:
Board - lol - MSi 990FXA-GD80 MSI Global - The Leading Brand in High-end Gaming & Professional Creation
Question:
How can I trace the component(s) that are causing this.
Main observations:
1. No POST.
2. Board HAS Power.
2.1 CPU cooler get > room temp if the fan is off. Once the fan is on, its always warm to the touch.
3. Debug LED = "FF" with or without CPU... I say this is for F*cking F*cked, but lets see... Google says it means the board or CPU is F*cking F*cked, so same same but different. I'm not doing this to end it with "FF". I want to learn, irrespective of fixing it "soon".
4. Fans spin.
5. FAN headers read 10v................................?
6. Fan + & - both give continuity to the ground plane ( metal around USB ports).............................?
7. All USB2 ports work (charged phone - pulled 5-7v ; used a UNI-T tester aswell.
7.1 2x USB3 ports (the only USB 3 ports on the back I/O) are electrically dead - UNI-T tester tool can't power on using the port..........................?
7.1.1 I used a butchered phone charging cable and exposed the ends to try test its voltage ( Like political party accountability - there was none) - cant recall is the short was present across those 2 specific contacts, I'll double check. This cable on any ofther USB port on this board gives +-5v.
7.1.2 I'll also verify the resistance across those 2 points vs the working USB 2 ports next to it.
7.2 A chip just 15mm south of the USB / ethernet ports does get warmer then most other naked SoC/SMD that I can prod with my strong hand (scary movie ref) for 10seconds.
8. When the PSU itself is turned on (board itself has not been turned on) 1x LED on the ethernet port lights up and flash's constantly...............................?
9. Debug LED's are numerous, I'll upload an image of which ones are lit up, +- 9/10 are, bar 2 for the CPU phase LED indicators (1-8 AFAIR ; 1-6 = lit). Seperatly to the CPU phase LEDS's are (but not limited to) 2x LED's labled "NB", both of these are lit.
THOUGHTS:
1. Multiple shorts to ground in various erea's of the mobo. (PSU is used regularly).
2. Short involves 2x USB 2 ports, ethernet port, cpu's isolated power section on the mobo.
3. Perhaps the ethernet / USB 3 port was struck by lightning or a local electrical surge?
TOOLS:
1. UNI-T UT89x T.RMS multimeter.
2. " " UT61E (T.RMS 22k count LCD for finer readings)
3. " " USB Tester UT658Dual
4. Soldering iron
5. 450W PSU x3
6. Heatgun
7. Aceton / 99% Isopropyl
8. DC injector max 60W (12v 6a)
I've run though a few basics and got further then I did the last time I took a stab at this specific board:
Board - lol - MSi 990FXA-GD80 MSI Global - The Leading Brand in High-end Gaming & Professional Creation
Question:
How can I trace the component(s) that are causing this.
Main observations:
1. No POST.
2. Board HAS Power.
2.1 CPU cooler get > room temp if the fan is off. Once the fan is on, its always warm to the touch.
3. Debug LED = "FF" with or without CPU... I say this is for F*cking F*cked, but lets see... Google says it means the board or CPU is F*cking F*cked, so same same but different. I'm not doing this to end it with "FF". I want to learn, irrespective of fixing it "soon".
4. Fans spin.
5. FAN headers read 10v................................?
6. Fan + & - both give continuity to the ground plane ( metal around USB ports).............................?
7. All USB2 ports work (charged phone - pulled 5-7v ; used a UNI-T tester aswell.
7.1 2x USB3 ports (the only USB 3 ports on the back I/O) are electrically dead - UNI-T tester tool can't power on using the port..........................?
7.1.1 I used a butchered phone charging cable and exposed the ends to try test its voltage ( Like political party accountability - there was none) - cant recall is the short was present across those 2 specific contacts, I'll double check. This cable on any ofther USB port on this board gives +-5v.
7.1.2 I'll also verify the resistance across those 2 points vs the working USB 2 ports next to it.
7.2 A chip just 15mm south of the USB / ethernet ports does get warmer then most other naked SoC/SMD that I can prod with my strong hand (scary movie ref) for 10seconds.
8. When the PSU itself is turned on (board itself has not been turned on) 1x LED on the ethernet port lights up and flash's constantly...............................?
9. Debug LED's are numerous, I'll upload an image of which ones are lit up, +- 9/10 are, bar 2 for the CPU phase LED indicators (1-8 AFAIR ; 1-6 = lit). Seperatly to the CPU phase LEDS's are (but not limited to) 2x LED's labled "NB", both of these are lit.
THOUGHTS:
1. Multiple shorts to ground in various erea's of the mobo. (PSU is used regularly).
2. Short involves 2x USB 2 ports, ethernet port, cpu's isolated power section on the mobo.
3. Perhaps the ethernet / USB 3 port was struck by lightning or a local electrical surge?
TOOLS:
1. UNI-T UT89x T.RMS multimeter.
2. " " UT61E (T.RMS 22k count LCD for finer readings)
3. " " USB Tester UT658Dual
4. Soldering iron
5. 450W PSU x3
6. Heatgun
7. Aceton / 99% Isopropyl
8. DC injector max 60W (12v 6a)
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