I'm trying to extract firmware from a [URL="https://www.tc-helicon.com/product.html?modelCode=P0DI7"]GoXLR-Mini[/URL]

[url]https://www.tc-helicon.com/product.html?modelCode=P0DI7[/url]

I know it's not ideal, but I'm trying to extract the 64MB firmware without removing the chip. I've done this before, but I realize it's a case-by-case thing. Unfortunately, it seems this board's layout results in it getting powered by my SPI tool (Buspirate), failing extraction.

I believe the issue is the flash chip's HOLD pin unable to get pulled high, as the...

Re: How to diagnose whether a TV LED is bad (without using an LED tester)?





Thanks guys. My hesitation was there seems to be a general warning against willy-nilly sourcing unregulated power to test an LED, at least for "specialized" TV LEDs, versus powering through the LED's constant current driver -- the (seeming) risk, as far as I understand, being inadvertently burning or damaging the LED because it's not powered through its current-regulated driver or at least a regulated power supply like an LED tester. Some of the comments [URL="https://electronics.stackexchange.com/questions/215018/what-voltage-is-a-3-led-light-from-a-led-tv/215078"]here[/URL],...

If a multimeter in diode mode isn't sufficient enough to diagnose which LEDs may be bad on a TV, how can this be measured (without having to buy an LED tester tool)?

Or rather, perhaps a better way to ask is: how can one replicate the specific testing an LED tester is able to do without having an LED tester tool? And particularly when a multimeter in diode mode shows that every TV LED lights up just fine + every LED has the same forward/reverse voltages.

In another thread, neilc6 mentioned that a multimeter in diode mode isn't sufficient enough to determine, as it...

Re: Magnavox 46ME313V/F7 LCD shuts off immediately after displaying splash screen



I'm just seeing this response now, but I did some further testing last night, and it would seem that you've hit the nail on the head --

Here are pics of the TV's LEDs: [url]https://imgur.com/a/LhybiuT[/url]





As you can see in the pictures, each strip is divided into halves, the left half with 12 LEDs, the right half with 11, joined in the middle by a JST connector. Not yet knowing what neilc6 mentioned above, I decided to...

Re: Magnavox 46ME313V/F7 LCD shuts off immediately after displaying splash screen

Please forgive me for the necro! But I'm still trying to hack away at fixing this TV, though mine is a 50" (Magnavox 50ME313V).

Based on discussion and suggestions here, like the OP, I've narrowed it down to the LED strips, the TV shutting off after displaying the Magnavox logo and the "HDMI" source at the top right. At immediate TV startup, and whether the strips are plugged in or not (I've tested both ways), the voltages at all three LED drivers are about 55V.
...

Re: (un)Happy ending



By any chance were you ever able to determine what the problem was? I've come across a set with the same issue. Very frustrating, as it turns on fine, shows the logo across the screen just fine, and then shows a glimpse of HDMI1 source before immediately shutting off!...

Re: (Solved) AUO T37XW02 T-Con board, transistor identification after short-circuit



This thread is just what I need! Thanks much for the info + investigation. I also have a 37-inch T-Con board very similar to yours. The AS15-F went bad, I soldered in a new one, tried turning the TV on, then POOF, the magic smoke arose :/

I can see the scorched Q301 transistor on my board in the AVDD section, so I assume I'll have to replace that. But my worry is that other things may have also gotten damaged -- how were you able to tell that the B201 was bad?
...

Re: Samsung PN50A510 P3FXZA Plasma Cycling On/Off

Really sorry for necro'ing an old thread, but I was wondering --

I need to replace my C102 capacitor, which I don't have an SMD replacement for, but I've seen others use through-hole electrolytic caps instead, so I'm wanting to give that a try. Couple things puzzling me:
[LIST][*]I've seen some suggest soldering a replacement capacitor [I]on top [/I]of the C102 capacitor -- anyone know why? If the original C102 cap was only halfway "dead" (i.e., not a complete 100% no-circuit-flow dead-end), wouldn't...

Re: New Members - please post your introductions here

Buongiorno a tutti! I am an electronics hobbyist, wanting to develop better skills to repair electronic devices. I know computers well and am hoping to better learn electrical engineering skills. I've read a number of threads and posts from this community from google searches and it seems like a great community to be a part of!