Question about Compaq 239427-001 Laptop AC Adapter 18.5V-3.5A(4.2mm+4.8mm)*1.7mm 65W

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Dead No output voltage

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No voltage output signifies a BAD AC Adapter. Search eBay with part number, then order a GENERIC AC Adapter with low price of $6.80 including shipping.

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

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Set dead powersupply ok


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Oct 11, 2014 | Samsung CW29M64NS 29" TV

1 Answer

DEAD AC ADAPTER OUTPUT DC VOLTAGE IS ZERO


Check fuse in plug. If that's OK buy a replacement adapter. Cheap on eBay!

Jan 03, 2014 | Computers & Internet

1 Answer

When connected to AC mains and switched on there was no sign of glowing led displaying charger is "ON"


Use multimeter to check output of AC Adapter. If no DC output at required voltage you should replace adapter; available after market units sell for $10 to $15 delivered.

Jan 03, 2014 | Compaq 239427-001 Laptop AC Adapter...

1 Answer

52xv645u is dead no power or 5v


Power supply is the suspect on this one. You will have to isolate the power supply in the unit and check the voltages on the input and the output side to verify it is or is not the problem.

Nov 21, 2012 | Toshiba Regza 52XV645U LCD TV

1 Answer

Beringer PMH 660M has very low power output to speakers and when the volume in increased the output pops in the speakers and goes completely dead, everything else works ok and the lights stay on


could possibly be the volume switch, try changing the switch with one that you hardly use to eliminate the problem. any further probs just let me know. hope this helps

Feb 16, 2012 | Behringer Music

1 Answer

HP P4SD, its running good with 4 gb RAM, P4 3.0ghz, and a couple sata hd. The problem is the fan output voltage, i havent been able to read the output chassis and cpu cooler pins voltage cause i can find...


"i can find my dmm?" did you mean CAN'T?
"its clearly off", what is off?
the fans are 3 pins,2 are power, one is RPM tachometer.
"it all works fine", so you can boot and run any OS, ?

"the voltage reads +12vdc", where, at fan or PSU?
the fans run off 12vdc, they are DC motors (from outside fan)
if the fan runs slow at 12vdc the the fan is bad or is a low RPM
fan, as some are, bigger fans run slow, for less noise.!

first is the CPU fan it must run full speed, if not the CPU will overheat in seconds and ALL CPU shut them selves (by there selves) this way. so CPU fan is first. what does it do... there....?

then BIOS screens. GOT BIOS UP? and running? with, ESC key pressed>.
let me guess your symptoms
1: PC dead. will not boot.
2: BIOS dead.
3: all fans DEAD,.
4: power switch works and all PSU voltages read right, (seems not)/?
5: if the PSU power wire reads right(DMM), matching the side sticker voltages, and the CPU is dead, the MOBO is dead, or CPU is toasted.


here is a modern PSU, sticker.
see 5 to 10 power lines, see them. all must read correctly
if a fan is dead, then its dead if 12vdc is present on the fan power pins.




psu-dsqaqngzuibs2svxh2bga4t0-2-0.jpg

Apr 28, 2017 | HP Asus Motherboard P4SD-LA Socket 478...

1 Answer

Sony kv32v15 is dead with no sounds are lights. How difficult is it to replace the power supply / power management components?


since the problem is dead set all you need is open the back cover to trouble shoot, use digital tester. check blown fuse and then power on the unit check the output voltage at power supply panel board which supply the main CRT chassis board. if no output voltage check open fusible resistor its about .1 ohm, then check shorted rectifier diode and transistor sometimes cause by voltage fluctuation. just consider also the horizontal out put transistor it might be shorted cause by over current coming from power supply.

Apr 17, 2011 | Televison & Video

1 Answer

My psp can't turn on with the battery but when i put it on the charge it work .what can i do ?


Hi,
That problem means your battery is dead, and needs to be replace!
Check the physical and voltage output of your battery, if its bloated, that means battery is dead. If no power output from battery and its not bloated, the internal circuit in the battery is dead.
Hope that explains everything!
Thanks for using Fixya!

Dec 09, 2010 | Sony PlayStation Portable (PSP) Console

1 Answer

Panasonic TX-29ps stdby LED only 2 seconds after switching to the network, everything else is dead. However, Switching PSU IC801 provides voltage to 5V for stdby.


check : H-output tangester / EHT output voltage line 12v /24v 180v check dyiod /capaciter / ragistance ..
if your tv set red led is cantinu on then standby tr.checked if ok then
cheked 5v ragulater ic or prosasor cristl and with canecting pf


1.open s.by tr. check pin voltage
if ok
then check EHT output section h-driver transfermor h-puls 2.1v ac
if not then check croma ic input voltage B+ is 8 v dc and canacting spaer.


Oct 19, 2009 | Panasonic TX-29S90X TV

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