Search found 7 matches

by msrego
Tue Mar 24, 2020 1:35 am
Forum: Troubleshooting
Topic: [DEFECTIVE] Another Dead Latte Panda Alpha (no LEDs)
Replies: 4
Views: 4810

Re: [DEFECTIVE] Another Dead Latte Panda Alpha (no LEDs)

Hello philgaskin, From the voltage reading you gave, it is very probable you have a short circuit somewhere in the board, most probably on the 5V rail (due to the 0V readings). Check the thread I opened and see if the 5V rail is shorted by measuring the resistance across the capacitor I circled in t...
by msrego
Fri Dec 20, 2019 5:46 am
Forum: Troubleshooting
Topic: Bootable USB not in bios boot menu
Replies: 4
Views: 4755

Re: Bootable USB not in bios boot menu

Hello tubbs,

Have you tried another USB flash drive?
I am asking because I have a particular flash drive which I was never able to boot from. I later found that the controller of that drive is known to have that issue (SMI branded controller).
by msrego
Mon Dec 16, 2019 8:47 pm
Forum: Troubleshooting
Topic: Fried my Lattepanda alpha 864s
Replies: 6
Views: 7122

Re: Fried my Lattepanda alpha 864s

Hello again, Alex. I'm sorry to inform you but, if you get a spinning fan right after you plug the power supply to the board, it is highly probable you have damage in the embedded controller (EC), the LQFP-64 chip marked ITE8110, which controls the power on sequence, the fan, etc. Also, the EC power...
by msrego
Fri Dec 06, 2019 2:58 pm
Forum: Troubleshooting
Topic: Component identification: capacitor
Replies: 2
Views: 3098

Re: Component identification: capacitor

calpin wrote:
Fri Dec 06, 2019 9:22 am
You're right. It's 0402 smd 10uf 6.3V capacitor , used for suppression and coupling. Hope can help you
Thank you calpin. I will proceed to order the capacitor and replace it.
by msrego
Thu Dec 05, 2019 5:27 pm
Forum: Troubleshooting
Topic: Fried my Lattepanda alpha 864s
Replies: 6
Views: 7122

Re: Fried my Lattepanda alpha 864s

what should I do I don't want it to be a 500$ waste... From the damage pattern caused to the board, I am lead to believe that your 5V rail was overvolted. First, I would remove all the burnt voltage regulators with an hot air SMD rework station, and verify both the 5V and the 3.3V rails for shorts ...
by msrego
Thu Dec 05, 2019 5:00 pm
Forum: Troubleshooting
Topic: Latte Panda Defective - No Lights
Replies: 3
Views: 6171

Re: Latte Panda Defective - No Lights

Hello. I also had the no LEDs symptom, and I traced it back to a shorted to ground ceramic capacitor. Try to measure the resistance of the output and decoupling capacitors of the DC/DC converters. Anything less than 7 ohm will indicate an probable short circuit. Don't forget that the capacitors for ...
by msrego
Thu Dec 05, 2019 4:48 pm
Forum: Troubleshooting
Topic: Component identification: capacitor
Replies: 2
Views: 3098

Component identification: capacitor

Hello, Before anything else, I want to thank all the community for all the help given in order to troubleshoot the boards that have powering problems. I was using my Alpha 864 board as usual, powered via the supplied USB-C adapter and it shut itself down. After suspecting a bad power supply I tried ...