Share or download datasheets or application notes for electronic components and other parts. Contribute your knowledge or ask questions. Before using please read our Terms of Service. Topics: 1 Posts: 4 ..read more

Hello friends, today i got an A2485 820-02100-A in a desd state, found visual short on PPVIN_5VUSBC23 line, removed tantalum capacitor, installed same same value from other donor board, now there is no short on any of the rails but when i plug either magsafe3 or usbc inget 5v stable with 0.00 amps drown, no cycle, just these steady values, board is not in dfu mode, checked with magsafe and with usbc. Only value that i find on the board is ppdcin_aon which is 5v… i dont get 3,3 aon, 3v8 aon .. all missing, where should i start looking please !... Troubleshooting Laptops, Tablets, and Mobile Dev ..read more

Hello everyone from Italy, I'm here to ask for help on a Vestel TV, I've had a Vestel TV branded "XD" with a broken screen for years, but now I've found a Telefunken (still Vestel but older) and I've mounted the panel on the "XD" TV, it works, but the screen is upside down, given that Vestel does not allow you to rotate the image from the service menu, does anyone know how to solve the problem? the original panel is marked ves315WNDS-2D-N12 while the main board 17mb110, the panel I mounted instead in the tv (from the telefunken) is a ves315WNDA-02. ... It is not worth repairing ..read more

I have a Lenovo Think Station P700. I bought it second hand in order to use it as a server for home use for testing purposes. It was running Windows 10 when purchased and I did an update and the BIOS stopped working. I took it to a repair shop and they couldn't find the BIOS for the P700 and told me they put the BIOS from the p500. But at the moment the BIOS is missing Intel ME. It only shows Intel ME Firmware Version N/A. And current state is: it stuck at Lenovo logo. I'm not a professional, but I have a CH341a and did a dump of the current BIOS ..read more

Pioneer amplifier A-205 Relay not clicking after a mistake i made Because the unit is old (but only occasionally used) the loudness button causes some noise due to bad contact, sprays did not work, so i decided to solder the pins that it connects on the pcb at the on (loudness on) position i did that and it worked fine, i know from the bottom of my heart that the switch connects 2 pins and also d/c other 2 pins on every position it have (6 pin switch), so i was curious what would happen if i clicked the switch off while the pins are soldered at on (so basiclly on and off at the same time), whe ..read more

HP Probook 430 G2 (LA-B171P) Battery not detected Troubleshooting Laptops, Tablets, and Mobile Devices I believe smth is wrong with my PC ((. Searching this forum I found some nice suggestions. So, I tested Battery Connector pins (charger in/battery out) and here are my results: As far as I understand SDA pin must be ~3.3v??? Are there any other tests I can do before disassembling motherboard ..read more

Hey guys got laptop like above. Came to me with shorted main power rail and battery protecion on ( 0V on output). Got rid of short but nothing. Bench power supply says it takes nothing, but still got all voltages 1,2v,3.3v,5v - all good. Thermal cam showed nothing is starting even for a sec. I believe that since all coils etc are good resistance to ground it's probably one of chips. Can be IO chip or maybe something else? Could somebody help me out with this one - it's blowing my mind lol Troubleshooting Laptops, Tablets, and Mobile Devices ..read more

Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey. Troubleshooting Laptops, Tablets, and Mobile Devices [URL=filedata/fetch?id=3266119&d=1715040463][ATTACH=JSON]{"alt":"Click image for larger version Name:\timage.png Views:\t0 Size:\t151.9 KB ID:\t3266119","data-align":"none","data-attachmentid":"3266119","data-size":"thumb"}[/ATTACH][/URL ..read more

Hi, Asus P2451F board P2451FB rev2.0, flooded with liquid. I need schematic or element identification, please see the photo ..read more

Got this projector which has a problem with a lack of blue. Menu text is very yellow... expecting white. If I input a signal from a test disc via hdmi, a red screen image shows a uniform red as expect. Green similar while the blue does show but with non-uniformity. Looked at the in-polarizers. They are all good and clean. Running the projector to expose the light area in the prism block, shows each color well represented, all looking about the same intensity from the naked eye. Looking at the prism block itself and sending a light source back into the "out port", the individual ..read more