Re: Hannspree hf237 problems
much thanks guys
much thanks guys
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Re: Hannspree hf237 problems
hey guys.. i tried replacing the Q802 transistor. plugged it back up and heard a tic tic tic tic sound coming from D806 transistor. im sure it is that one coz i took it out and the sound went... now the sound only comes when i plug in the vid board, when i unplug it it tickes 2 or 3 times then stops... ill bu the cap repair kin in a few days, but wanna know if anyone has any ideas as what can make it tick like thatComment
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Re: Hannspree hf237 problems
Replacing it ? was there something wrong with it - I dont see it mentioned previously in this thread.
If it was faulty that would probably be due to the bad caps so by switching it on without replacing the caps you may have well damaged it or the other one again.
Iicking is often from a transformer producing a voltage that is not used. In this case as the lamps do not light that may be the reason.
What you can do is do a resistance test on the secondary windings on both inverter transformers.
Reading the thread it seems the wiring and the bulbs could be a problem
do you have anything you could try the bulbs on?Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Hello,
on this laptop hp g72 b52sf i have screen problems as you can see with the photo joined in attachments.
the used graphic card is "intel hd graphics" and the id of the integrated screen is : "monitor/SEC3354".
i verified the driver of the péripherals and they are ok. i verified the definition and settings of the graphic card and of the screen : definition 1600x900 and refreshment frequency :60hz. (they are the sames for the graphic card and the screen).
i don't understand the reasons of the white stripe at the bottom of the screen below the task... -
Recently I discovered my SSD died (OCZ/Toshiba 240 GB). It was in a USB enclosure, attached to the Linksys WRT-AC1200 router. Since then I removed the USB enclosure and attached it to my Win7 PC (AMD 8150 CPU, 970 chipset, 64 GB RAM). I also gathered one or two other USB enclosures to figure out what is going on.
(I suspect that I lost quite a few MP3 and FLAC files I recently ripped from my audio CDs, I think I lost very little un-replaceable stuff.)
I think it is IMPOSSIBLE for Win7 to have any problems with a USB enclosure as long as Win7 knows how to speak to the... -
Hi guys, I am new here, but I've tried my best to read up on the beginner guides and reading some other threads. So here the base information i can provide.
-Lenovo P14s Gen 2 AMD
-Ryzen 7 5850u
-16GB soldered (32GB stick added, removed for debugging)
-256GB SKHynix SSD (removed and swapped for debugging)
-NM-D451 Motherboard (P/N: 5B21C82277)
-S/N: PF-34N64A
-Model: 21A0-000QGE
History and symptoms:
I had this Laptop for some time but stopped using it (installed Linux, worked perfectly) as I changed company and got a MacBook... -
Hi:
i am trying to repair this Christmas lights from my parents. They are incandescent lights, no led lights.
I have tried with 12V a 24V small lights that I found in Aliexpress but is obvious that are not the right ones. They last microseconds connected. Do they blow because of Amps or Volts?
If I measure the Amps in the string........it's only 90mA. If I measure the Volts in the "green box"......it's between 0 and 190V, but doing a little bit of maths from the number of bulbs in series.......it's only about 6V per lamp.
Could... -
Hello,
I have a Lenovo here that does not want to power on. The motherboard appears to be clean, no sign of corrosion or obvious fried components. When plugged in, I see 3 blinking lights and then off. It would cycle the 3 blinking lights every 10 seconds or so as long as I have the adapter plugged in. Amp meter shows 20 volts, 0.224 amps, no fan spin, red light indicator near the charge port.
Thermal camera shows a section of the motherboard that is warmer than the rest. It is near the connector labels JRTC1 (CMOS battery). Diode measurement to ground for pin 1 = OL,...
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