I have a short on a EDM-020 motherboard but dont have another to replace them with or compare against. Can anyone tell me the value of the capacitors outlined in red in the picture? Thanks in advance.
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Hi, Would appreciate some help.
I have an Apple Late 2013 15" A1398 MacBook Pro with Logic Board 820-3662.
Get charger light but no fan spin or chime. No liquid damage.
Found PPBUS and VCORE both shorted to ground. Other rails were ok.
Removed VCORE MOSFETS U7310, U7320 and U7330. Found U7330 was in fact shorted.
With the 3 MOSFETS removed, get PPBUS and fan spin. VCORE is still hard shorted to ground (0 ohms).
Attempted voltage insertion on VCORE to locate short using bench supply set at 1.0 VDC and 4.95 Amps (max current for my... -
Dear all,
I have taken out the motherboard of a Acer TravelMate P214. There is a short to ground on the main power rail (19V). I don't have the schematics or boardview for this board (DAZ8IMB1AA0 REVA). But I have found 4 MOSFETS close to the main power rail : 2 N-Channel and 2 P-Channel.
I have checked resistance across each of the 4 MOSFETS. I have the following readings:
Both N-Channel Mosfets: nothing odd
P-Channel MOSFET number 1:
source - drain : 117 kOhm
source - gate: 96 Ohm
gate - drain: 117 kOhm
P-Channel MOSFET... -
Dear all,
Laptop is Lenovo Thinkpad L480 (boardview can be found in this badcaps topic). When pressing the power button the LED power light turns on, but nothing else happens.
I removed the motherboard, checked for shorts on the main inductors. I found that there is a short to ground on the +3VALW_P rail (@PL201). I soldered a wire on the PL201 inductor, and I injected up to 1.3V with my power supply. Current drawn is approximately 3.2A.
I used a small thermal camera to locate the shorted component. But nothing on the board heats significantly, except the... -
Laptop does not power on but has a fix white light on power button, when connected to power.
I found, while trying to diagnose, a hot spot in the motherboard and found it to be a shorted capacitor (see photo below) on the 2.5v (2D5V_S3 on schematics). After replacing it with one from a donor board, still, the board does not turn on...
The usb-c meter reads upon connection 20.1v and 0.00a, with some occasional flashes to 0.03amps. After 10/15 seconds circa, it goes to 5.2v and draws an almost constant 0.07amps. (same behaviour as before)
To my fingers, nothing seems... -
Hi, on the UX133U motherboard (little info) the KBC (IT8987) has pin 59 shorted to ground, so there is a key always pressed.
Does anyone know if it can be cancelled by modifying the bios bin or reprogramming the KBC?
Thanks.
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