Electronics Repair

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Tripp Lite BCPERS450 UPS

The UPS has always been plugged in a A.C. outlet but one day I presses the Power On button and it didn't come on. Would...
3 comments posted 1yr
posted by Ed.Vance
3 comments posted 1yr posted by Ed.Vance

It was so, so easy to repair the microwave oven

It was so, so easy to repair the microwave oven, which was sparking with the current used to waken Frankenstein's monst...
1 comments posted 1yr
posted by NONONOmisc07
1 comments posted 1yr posted by NONONOmisc07

Service Centre Closure

Hello All. Quantum Technologies Service Centre was closed down by upper management at the end of March 2025. The former...
0 comments posted 1yr
posted by marc.w
0 comments posted 1yr posted by marc.w

HP printer trouble

Hi, I have an HP Color LaserJet CP1515n printer since 2008-09. It has printed a total of 6339, according to itself. Not...
28 comments posted 1yr
posted by robin_listas
28 comments posted 1yr posted by robin_listas

Lead acid battery tester

Hi, I bought yesterday a battery for my UPS at a shop that specializes in batteries. I had my old battery there, so to...
6 comments posted 1yr
posted by robin_listas
6 comments posted 1yr posted by robin_listas

Cell Phone Charging

When I was in High School I took a Electric class. There was a 6Volt Battery , some assorted length wires with battery...
13 comments posted 1yr
posted by Ed.Vance
13 comments posted 1yr posted by Ed.Vance

Universal power supply for PCs, setting voltage

I probably don't need a universal auto power supply, but otoh, if I'd bought one for the last laptop, I wouldn't to spe...
5 comments posted 1yr
posted by NONONOmisc07
5 comments posted 1yr posted by NONONOmisc07

KA7500 vs TL494

Chinese commodity power supplies have tended to use recognizable configurations from times gone by. In doing so, it's e...
0 comments posted 1yr
posted by legg
0 comments posted 1yr posted by legg

Waking up a serial port

While looking around inside a 12 volt to 120 volt inverter charger I noticed a pin header labeled "5v Rx Tx Gnd" near t...
16 comments posted 1yr
posted by bp
16 comments posted 1yr posted by bp

Car Power supply

I rented a car last week, a mazda 3 maybe 2024 or 5, and it had no cigarrette lighter port, only a round cap where it s...
7 comments posted 1yr
posted by NONONOmisc07
7 comments posted 1yr posted by NONONOmisc07

Chinese or Realtek; can't connect with wifi

I've been having trouble with with the wifi receiver in my fairly old Acer laptop**, but, showing good foresight, years...
5 comments posted 1yr
posted by NONONOmisc07
5 comments posted 1yr posted by NONONOmisc07