Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V under load and run at 18.5V and it will still run but if you are really using it and the adapter gets overloaded you have a problem. As such I generally consider 19V (no load) on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
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Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V without load and run at 18.5V under it will work, but if you load it heavily it will have problems. As such I generally consider 19V (no load) on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these. Use this guide up to Step 3 to access the battery on the motherboard: [guide|121712]
Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V under load and run at 18.5V and it will still run but if you are really using it and the adapter gets overloaded you have a problem. As such I generally consider 19V on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
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Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V under load and run at 18.5V and it will still run but if you are really using it and the adapter gets overloaded you have a problem. As such I generally consider 19V (no load) on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
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If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these. Use this guide up to Step 3 to access the battery on the motherboard: https://www.ifixit.com/Guide/HP+Pavilion+21+TouchSmart+All-In-One+PC+Rear+Chassis+Fan+Replacement/121712
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If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these. Use this guide up to Step 3 to access the battery on the motherboard: [guide|121712]
Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V under load and run at 18.5V and it will still run but if you are really using it and the adapter gets overloaded you have a problem. As such I generally consider 19V on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
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If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these.
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If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these. Use this guide up to Step 3 to access the battery on the motherboard: https://www.ifixit.com/Guide/HP+Pavilion+21+TouchSmart+All-In-One+PC+Rear+Chassis+Fan+Replacement/121712
Check the power supply with a multimeter first - these use laptop supplies and they're prone to burning out from 24/7 use on a machine like this. These use 19.5V supplies like a laptop does so it shouldn't dip past 19V under load. Now that said it's fine for it to dip to 19V under load and run at 18.5V and it will still run but if you are really using it and the adapter gets overloaded you have a problem. As such I generally consider 19V on a adapter used on an AIO to be "replace" voltage to avoid issues. This is probably the cause of failure. Get a 90W adapter even if it can run on 65W as it will give you mote headroom for issues like this.
If that doesn't help I would take the machine apart and test/replace the CMOS battery. A lot of HP products from this period are sensitive to the battery voltage and do things like this. If it is at 2.5V you have to replace it with these.