My friends please help. This HP R23 (DA0R23MB6D1). In PQ24 had burnt. EC2 and PC106 Capacitors were shorted. I replaced. Now no ACIN signal. So no PQ48 gate signal.Signal coming from PU9 IC, pin number 9, after passing from PR156 going low voltage. TO CHECK I removed PR156 And gave 3.3V supply. Then ok power on Display ok. PQ24 going heat. IF battery inserted charging voltage coming for a about 2-3 seconds only. Then not charging. I can't find why not coming ACIN signal and battery not charging continuously. Thanks
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10th generation hp laptop(LA-G07FP motherboard) missing ACIN signal.charger light not blow.when pressing power button, only 3 blinks display on dc adapter bulb(only once).but not turning on.original hp charger attached.charging port perfect.
19v (gate 25v) main power rail ok
RTC section ok.
3vldo ok
5vldo ok.
ECON missing.no 3v and 5v always voltage.
REGN,ACDET perfect.but ACIN missing.No short in ACIN path(good impedence)
Replaced the bq24725a charger ic.but no result.still ACIN not generating.
is this sort of error occurs from... -
Hi everyone, over the past few months i have taken a deep dive into motherboard diagnostics and I love the challenge. Currently im trying to learn all about the signals that travel around the motherboard, such as frequencies, enable signals High and Low logic states etc. And i have been learning to read and using the Schematics for this board that i requested here on Badcaps forum, from a few months ago, this is such a great place for these.
I’ve been working on a GA-970A-DS3 (rev. 1.0) that does not post. This motherboard has been my main learning board. I would like share...11-23-2023, 11:02 PM -
Failure Symptom
No picture, just red vertical stripes. Google search shows quite common problem for these recent Vizio M series although red vertical stripe pattern may differ. Some call it "Netflix" boot screen haha.
Where is the short?
Panel has 4x buffer boards. Quickly found the 1/4 panel buffer board with the problem by selectively disconnecting buffer board flex cables.
Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but... -
Hello all,
Working on my first C64 / Breadbin / 250407. Purchased as non-working. Getting black screen.
More detail below, but for those that want to get right to the question.... Here are a few waveforms comparing the Pin15 output on the VIC chip (luma/sync) to the pin 4 on the AV socket (composite signal).
https://imgur.com/gallery/PpqcqPY
My question is: Is the composite waveform range of 0.1v-1v too low for a c64?
More detail:
Symptoms are that that I get... -
Hi, guys!
I am not a professional, all I can do is solder stuff on the boards, so I would really appreciate it if someone with knowledge shares his experience/thoughts on a problem I have with a PS4 console.
My friend gave me an original fat PS4, board model SAB-001, with WLOD, that has been previously opened. I changed the HDMI port, couple of pads on the board were ripped, which I connected to the corresponding caps/resistors? Just did so as in a shown diagram (one of the ground pads I ripped off and left it not connected). However, there was still no signal, so...