More specifically U4 and U5 in the image. They are next to the T2 terminal on the BMS board.
-
-
I am not aware of anyone fixing Ryobi BMS boards, they usually swap out the BMS board. -
Yea I reckon most get swapped out due to permanent firmware kills. The reason I'm asking though is I'm working on a number of P190 batteries. What's nice about them is that they run Attiny88's as the brain, and even nicer thing is that the protection fuses are not blown, so both the flash and the eeprom can be read. I'm trying to figure out of the firmware kill can be removed and in the process I'm creating schematics of the whole board. There's only a few components on the board I don't recognize, and U4 and U5 are currently the most interesting.
Comment
-
Hum, I think I have it identified. The form factor was wrong, it's not a SOT23-6.
The IC in question seems to be MUN5314DW1, SOT-363.Comment
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
-
Hi guy's I hope I've put this in the correct section. I have an Asus X415JA board that has had some bad corrosion on the main power rail. The owner (my sons girlfriend) left it sitting too long after liquid damage before bringing it to me and it has corroded badly with time. I'm struggling to identify the values of the faulty components so I can replace them. Below I have a pic of the same board I found online showing the components with a red box around them. Also if you look over to the left below the display connector there is a small cap that was also damaged. Any help greatly appreciated....08-18-2026, 03:55 PM -
My almost 15 years old desktop PC decided it was about time not to power on anymore. I replaced the PSU with a spare one I had and it went back on so I guess it was it. Now I'd like to try to take a look at the old one that went bust but I'm having trouble in identifieing it. I've taken some pictures of the board but haven't been able to find the schematics or almost anything online, expect for the LC500H-12 itself, the inside board seems to not showup anything.
Any assistance in identifying the board or pointing me toward the right schematics would be greatly...
Comment